265245000840 has 160 divisors (see below), whose sum is σ = 891715671000. Its totient is φ = 70716312576.

The previous prime is 265245000829. The next prime is 265245000847. The reversal of 265245000840 is 48000542562.

It is a happy number.

265245000840 is a `hidden beast` number, since 2 + 6 + 524 + 50 + 0 + 0 + 84 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 217863030564 + 47381970276 = 466758^2 + 217674^2 .

It is a super-2 number, since 2×265245000840² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 265245000795 and 265245000804.

It is not an unprimeable number, because it can be changed into a prime (265245000847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26981046 + ... + 26990874.

Almost surely, 2^265245000840 is an apocalyptic number.

265245000840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265245000840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445857835500).

265245000840 is an abundant number, since it is smaller than the sum of its proper divisors (626470670160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265245000840 is a wasteful number, since it uses less digits than its factorization.

265245000840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18181 (or 18168 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 265245000840 in words is "two hundred sixty-five billion, two hundred forty-five million, eight hundred forty", and thus it is an aban number.