261596690206 has 16 divisors (see below), whose sum is σ = 397112155200. Its totient is φ = 129228254848.

The previous prime is 261596690177. The next prime is 261596690221. The reversal of 261596690206 is 602096695162.

It is a congruent 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, 340630 + ... + 799513.

It is an arithmetic number, because the mean of its divisors is an integer number (24819509700).

Almost surely, 2^261596690206 is an apocalyptic number.

261596690206 is a deficient number, since it is larger than the sum of its proper divisors (135515464994).

261596690206 is a wasteful number, since it uses less digits than its factorization.

261596690206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141523.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 261596690206 in words is "two hundred sixty-one billion, five hundred ninety-six million, six hundred ninety thousand, two hundred six".