264440636541025 has 48 divisors (see below), whose sum is σ = 375045134464000. Its totient is φ = 181188041866560.

The previous prime is 264440636541017. The next prime is 264440636541113. The reversal of 264440636541025 is 520145636044462.

It is not a de Polignac number, because 264440636541025 - 2³ = 264440636541017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1316186026 + ... + 1316386924.

Almost surely, 2^{264440636541025} is an apocalyptic number.

264440636541025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

264440636541025 is a deficient number, since it is larger than the sum of its proper divisors (110604497922975).

264440636541025 is a wasteful number, since it uses less digits than its factorization.

264440636541025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206798 (or 206793 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 52.

The spelling of 264440636541025 in words is "two hundred sixty-four trillion, four hundred forty billion, six hundred thirty-six million, five hundred forty-one thousand, twenty-five".