261235025575 has 12 divisors (see below), whose sum is σ = 324158160040. Its totient is φ = 208841744160.

The previous prime is 261235025567. The next prime is 261235025581. The reversal of 261235025575 is 575520532162.

It is not a de Polignac number, because 261235025575 - 2³ = 261235025567 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3620469 + ... + 3691918.

Almost surely, 2^261235025575 is an apocalyptic number.

261235025575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261235025575 is a deficient number, since it is larger than the sum of its proper divisors (62923134465).

261235025575 is a wasteful number, since it uses less digits than its factorization.

261235025575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313826 (or 7313821 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 261235025575 in words is "two hundred sixty-one billion, two hundred thirty-five million, twenty-five thousand, five hundred seventy-five".