261564213601130 has 64 divisors (see below), whose sum is σ = 514104787468800. Its totient is φ = 95023970496000.

The previous prime is 261564213601123. The next prime is 261564213601181. The reversal of 261564213601130 is 31106312465162.

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 31 ways as a sum of consecutive naturals, for example, 504723407 + ... + 505241373.

It is an arithmetic number, because the mean of its divisors is an integer number (8032887304200).

Almost surely, 2^{261564213601130} is an apocalyptic number.

261564213601130 is a deficient number, since it is larger than the sum of its proper divisors (252540573867670).

261564213601130 is a wasteful number, since it uses less digits than its factorization.

261564213601130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522335.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 261564213601130 in words is "two hundred sixty-one trillion, five hundred sixty-four billion, two hundred thirteen million, six hundred one thousand, one hundred thirty".