264440611656560 has 40 divisors (see below), whose sum is σ = 622607009737920. Its totient is φ = 104437304854272.

The previous prime is 264440611656517. The next prime is 264440611656577. The reversal of 264440611656560 is 65656116044462.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 264440611656496 and 264440611656505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20920928147 + ... + 20920940786.

It is an arithmetic number, because the mean of its divisors is an integer number (15565175243448).

Almost surely, 2^{264440611656560} is an apocalyptic number.

264440611656560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264440611656560 is an abundant number, since it is smaller than the sum of its proper divisors (358166398081360).

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

264440611656560 is a wasteful number, since it uses less digits than its factorization.

264440611656560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41841869025 (or 41841869019 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 56.

The spelling of 264440611656560 in words is "two hundred sixty-four trillion, four hundred forty billion, six hundred eleven million, six hundred fifty-six thousand, five hundred sixty".