291264955525 has 24 divisors (see below), whose sum is σ = 371007353960. Its totient is φ = 226666978560.

The previous prime is 291264955489. The next prime is 291264955549. The reversal of 291264955525 is 525559462192.

It can be written as a sum of positive squares in 12 ways, for example, as 4139378244 + 287125577281 = 64338^2 + 535841^2 .

It is not a de Polignac number, because 291264955525 - 2¹⁵ = 291264922757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4776931 + ... + 4837519.

Almost surely, 2^291264955525 is an apocalyptic number.

291264955525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

291264955525 is a deficient number, since it is larger than the sum of its proper divisors (79742398435).

291264955525 is a wasteful number, since it uses less digits than its factorization.

291264955525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65833 (or 65828 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 55.

The spelling of 291264955525 in words is "two hundred ninety-one billion, two hundred sixty-four million, nine hundred fifty-five thousand, five hundred twenty-five".