265640506356432 has 40 divisors (see below), whose sum is σ = 688680102813120. Its totient is φ = 88231722154240.

The previous prime is 265640506356419. The next prime is 265640506356457. The reversal of 265640506356432 is 234653605046562.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9847276932 + ... + 9847303907.

It is an arithmetic number, because the mean of its divisors is an integer number (17217002570328).

Almost surely, 2^{265640506356432} is an apocalyptic number.

It is an amenable number.

265640506356432 is an abundant number, since it is smaller than the sum of its proper divisors (423039596456688).

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

265640506356432 is a wasteful number, since it uses less digits than its factorization.

265640506356432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19694581131 (or 19694581125 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 57.

The spelling of 265640506356432 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred six million, three hundred fifty-six thousand, four hundred thirty-two".