265161640432 has 40 divisors (see below), whose sum is σ = 561062527200. Its totient is φ = 120658594560.

The previous prime is 265161640399. The next prime is 265161640441. The reversal of 265161640432 is 234046161562.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8962807 + ... + 8992342.

It is an arithmetic number, because the mean of its divisors is an integer number (14026563180).

Almost surely, 2^265161640432 is an apocalyptic number.

It is an amenable number.

265161640432 is an abundant number, since it is smaller than the sum of its proper divisors (295900886768).

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

265161640432 is a wasteful number, since it uses less digits than its factorization.

265161640432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17955241 (or 17955235 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 265161640432 in words is "two hundred sixty-five billion, one hundred sixty-one million, six hundred forty thousand, four hundred thirty-two".