261204632610 has 16 divisors (see below), whose sum is σ = 626891118336. Its totient is φ = 69654568688.

The previous prime is 261204632603. The next prime is 261204632809. The reversal of 261204632610 is 16236402162.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4353410514 + ... + 4353410573.

It is an arithmetic number, because the mean of its divisors is an integer number (39180694896).

Almost surely, 2^261204632610 is an apocalyptic number.

261204632610 is an abundant number, since it is smaller than the sum of its proper divisors (365686485726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261204632610 is a wasteful number, since it uses less digits than its factorization.

261204632610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8706821097.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 261204632610 in words is "two hundred sixty-one billion, two hundred four million, six hundred thirty-two thousand, six hundred ten".