261808677215036 has 24 divisors (see below), whose sum is σ = 523661161453920. Its totient is φ = 112194331587072.

The previous prime is 261808677215023. The next prime is 261808677215087. The reversal of 261808677215036 is 630512776808162.

It is a self number, because there is not a number n which added to its sum of digits gives 261808677215036.

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, 390793481 + ... + 391462848.

It is an arithmetic number, because the mean of its divisors is an integer number (21819215060580).

Almost surely, 2^{261808677215036} is an apocalyptic number.

It is an amenable number.

261808677215036 is an abundant number, since it is smaller than the sum of its proper divisors (261852484238884).

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

261808677215036 is a wasteful number, since it uses less digits than its factorization.

261808677215036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782268293 (or 782268291 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 261808677215036 in words is "two hundred sixty-one trillion, eight hundred eight billion, six hundred seventy-seven million, two hundred fifteen thousand, thirty-six".