265624645 has 24 divisors (see below), whose sum is σ = 377323128. Its totient is φ = 178316160.

The previous prime is 265624627. The next prime is 265624669. The reversal of 265624645 is 546426562.

It can be written as a sum of positive squares in 4 ways, for example, as 8054244 + 257570401 = 2838^2 + 16049^2 .

It is a de Polignac number, because none of the positive numbers 2^k-265624645 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265624598 and 265624607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9022 + ... + 24751.

It is an arithmetic number, because the mean of its divisors is an integer number (15721797).

Almost surely, 2^265624645 is an apocalyptic number.

It is an amenable number.

265624645 is a deficient number, since it is larger than the sum of its proper divisors (111698483).

265624645 is a wasteful number, since it uses less digits than its factorization.

265624645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33813 (or 33802 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 265624645 is about 16297.9951221001. The cubic root of 265624645 is about 642.8201112942.

The spelling of 265624645 in words is "two hundred sixty-five million, six hundred twenty-four thousand, six hundred forty-five".