265387764964 has 81 divisors (see below), whose sum is σ = 558714074499. Its totient is φ = 109975929840.

The previous prime is 265387764959. The next prime is 265387764979. The reversal of 265387764964 is 469467783562.

The square root of 265387764964 is 515158.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 265387764964.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 223577979 + ... + 223579165.

Almost surely, 2^265387764964 is an apocalyptic number.

265387764964 is the 515158-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265387764964

265387764964 is an abundant number, since it is smaller than the sum of its proper divisors (293326309535).

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

265387764964 is an equidigital number, since it uses as much as digits as its factorization.

265387764964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454 (or 1227 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 67.

The spelling of 265387764964 in words is "two hundred sixty-five billion, three hundred eighty-seven million, seven hundred sixty-four thousand, nine hundred sixty-four".