261461659194 has 24 divisors (see below), whose sum is σ = 570960898560. Its totient is φ = 86467634568.

The previous prime is 261461659189. The next prime is 261461659253. The reversal of 261461659194 is 491956164162.

261461659194 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 616 + 5 + 9 + 19 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 261461659194.

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, 57185304 + ... + 57189875.

It is an arithmetic number, because the mean of its divisors is an integer number (23790037440).

Almost surely, 2^261461659194 is an apocalyptic number.

261461659194 is an abundant number, since it is smaller than the sum of its proper divisors (309499239366).

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

261461659194 is a wasteful number, since it uses less digits than its factorization.

261461659194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114375314 (or 114375311 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 261461659194 in words is "two hundred sixty-one billion, four hundred sixty-one million, six hundred fifty-nine thousand, one hundred ninety-four".