265436540460 has 768 divisors, whose sum is σ = 1035572428800. Its totient is φ = 54958030848.

The previous prime is 265436540393. The next prime is 265436540491. The reversal of 265436540460 is 64045634562.

It is a happy number.

265436540460 is a `hidden beast` number, since 2 + 6 + 5 + 43 + 6 + 540 + 4 + 60 = 666.

It is a super-2 number, since 2×265436540460² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1110613021 + ... + 1110613259.

It is an arithmetic number, because the mean of its divisors is an integer number (1348401600).

Almost surely, 2^265436540460 is an apocalyptic number.

265436540460 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 265436540460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517786214400).

265436540460 is an abundant number, since it is smaller than the sum of its proper divisors (770135888340).

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

265436540460 is a wasteful number, since it uses less digits than its factorization.

265436540460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 265436540460 in words is "two hundred sixty-five billion, four hundred thirty-six million, five hundred forty thousand, four hundred sixty".