265645661560625 has 40 divisors (see below), whose sum is σ = 332308121112000. Its totient is φ = 212287906152000.

The previous prime is 265645661560603. The next prime is 265645661560679. The reversal of 265645661560625 is 526065166546562.

It is not a de Polignac number, because 265645661560625 - 2⁸ = 265645661560369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2216073191 + ... + 2216193059.

It is an arithmetic number, because the mean of its divisors is an integer number (8307703027800).

Almost surely, 2^{265645661560625} is an apocalyptic number.

265645661560625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

265645661560625 is a deficient number, since it is larger than the sum of its proper divisors (66662459551375).

265645661560625 is a wasteful number, since it uses less digits than its factorization.

265645661560625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123675 (or 123660 counting only the distinct ones).

The product of its (nonzero) digits is 466560000, while the sum is 65.

The spelling of 265645661560625 in words is "two hundred sixty-five trillion, six hundred forty-five billion, six hundred sixty-one million, five hundred sixty thousand, six hundred twenty-five".