261564213601132 has 24 divisors (see below), whose sum is σ = 492985403204000. Its totient is φ = 120712770326016.

The previous prime is 261564213601123. The next prime is 261564213601181. The reversal of 261564213601132 is 231106312465162.

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 7 ways as a sum of consecutive naturals, for example, 190442757 + ... + 191811292.

Almost surely, 2^{261564213601132} is an apocalyptic number.

It is an amenable number.

261564213601132 is a deficient number, since it is larger than the sum of its proper divisors (231421189602868).

261564213601132 is a wasteful number, since it uses less digits than its factorization.

261564213601132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382267225 (or 382267223 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 261564213601132 in words is "two hundred sixty-one trillion, five hundred sixty-four billion, two hundred thirteen million, six hundred one thousand, one hundred thirty-two".