261357611496 has 16 divisors (see below), whose sum is σ = 653394028800. Its totient is φ = 87119203824.

The previous prime is 261357611479. The next prime is 261357611503. The reversal of 261357611496 is 694116753162.

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, 5444950216 + ... + 5444950263.

It is an arithmetic number, because the mean of its divisors is an integer number (40837126800).

Almost surely, 2^261357611496 is an apocalyptic number.

It is an amenable number.

261357611496 is an abundant number, since it is smaller than the sum of its proper divisors (392036417304).

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

261357611496 is a wasteful number, since it uses less digits than its factorization.

261357611496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10889900488 (or 10889900484 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The spelling of 261357611496 in words is "two hundred sixty-one billion, three hundred fifty-seven million, six hundred eleven thousand, four hundred ninety-six".