261592599064794 has 64 divisors (see below), whose sum is σ = 580581920194560. Its totient is φ = 78242485239360.

The previous prime is 261592599064793. The next prime is 261592599064799. The reversal of 261592599064794 is 497460995295162.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (261592599064793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787298529 + ... + 787630724.

It is an arithmetic number, because the mean of its divisors is an integer number (9071592503040).

Almost surely, 2^{261592599064794} is an apocalyptic number.

261592599064794 is an abundant number, since it is smaller than the sum of its proper divisors (318989321129766).

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

261592599064794 is a wasteful number, since it uses less digits than its factorization.

261592599064794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574929355.

The product of its (nonzero) digits is 2645395200, while the sum is 78.

The spelling of 261592599064794 in words is "two hundred sixty-one trillion, five hundred ninety-two billion, five hundred ninety-nine million, sixty-four thousand, seven hundred ninety-four".