265411813680 has 480 divisors, whose sum is σ = 991570035456. Its totient is φ = 63206148096.

The previous prime is 265411813663. The next prime is 265411813739. The reversal of 265411813680 is 86318114562.

265411813680 is a `hidden beast` number, since 2 + 6 + 541 + 18 + 13 + 6 + 80 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 95 ways as a sum of consecutive naturals, for example, 43062279 + ... + 43068441.

Almost surely, 2^265411813680 is an apocalyptic number.

265411813680 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 265411813680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495785017728).

265411813680 is an abundant number, since it is smaller than the sum of its proper divisors (726158221776).

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

265411813680 is a wasteful number, since it uses less digits than its factorization.

265411813680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345 (or 6336 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 265411813680 in words is "two hundred sixty-five billion, four hundred eleven million, eight hundred thirteen thousand, six hundred eighty".