265980564 has 24 divisors (see below), whose sum is σ = 689579520. Its totient is φ = 88660152.

The previous prime is 265980551. The next prime is 265980569. The reversal of 265980564 is 465089562.

265980564 is a `hidden beast` number, since 2 + 6 + 5 + 9 + 80 + 564 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265980569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231284 + ... + 1231499.

It is an arithmetic number, because the mean of its divisors is an integer number (28732480).

Almost surely, 2^265980564 is an apocalyptic number.

It is an amenable number.

265980564 is an abundant number, since it is smaller than the sum of its proper divisors (423598956).

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

265980564 is a wasteful number, since it uses less digits than its factorization.

265980564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462796 (or 2462788 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 265980564 is about 16308.9105706053. The cubic root of 265980564 is about 643.1070949294.

The spelling of 265980564 in words is "two hundred sixty-five million, nine hundred eighty thousand, five hundred sixty-four".