261477851532 has 48 divisors (see below), whose sum is σ = 619552281600. Its totient is φ = 85819296640.

The previous prime is 261477851501. The next prime is 261477851599. The reversal of 261477851532 is 235158774162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256944 + ... + 767447.

It is an arithmetic number, because the mean of its divisors is an integer number (12907339200).

Almost surely, 2^261477851532 is an apocalyptic number.

It is an amenable number.

261477851532 is an abundant number, since it is smaller than the sum of its proper divisors (358074430068).

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

261477851532 is a wasteful number, since it uses less digits than its factorization.

261477851532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024726 (or 1024724 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 51.

The spelling of 261477851532 in words is "two hundred sixty-one billion, four hundred seventy-seven million, eight hundred fifty-one thousand, five hundred thirty-two".