261594874672 has 20 divisors (see below), whose sum is σ = 509015356200. Its totient is φ = 130236073088.

The previous prime is 261594874649. The next prime is 261594874721. The reversal of 261594874672 is 276478495162.

It is a self number, because there is not a number n which added to its sum of digits gives 261594874672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35081422 + ... + 35088877.

It is an arithmetic number, because the mean of its divisors is an integer number (25450767810).

Almost surely, 2^261594874672 is an apocalyptic number.

It is an amenable number.

261594874672 is a deficient number, since it is larger than the sum of its proper divisors (247420481528).

261594874672 is a wasteful number, since it uses less digits than its factorization.

261594874672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70170540 (or 70170534 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 61.

The spelling of 261594874672 in words is "two hundred sixty-one billion, five hundred ninety-four million, eight hundred seventy-four thousand, six hundred seventy-two".