261096736164 has 48 divisors (see below), whose sum is σ = 666958414080. Its totient is φ = 78840635040.

The previous prime is 261096736151. The next prime is 261096736181. The reversal of 261096736164 is 461637690162.

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, 3457354 + ... + 3532065.

It is an arithmetic number, because the mean of its divisors is an integer number (13894966960).

Almost surely, 2^261096736164 is an apocalyptic number.

It is an amenable number.

261096736164 is an abundant number, since it is smaller than the sum of its proper divisors (405861677916).

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

261096736164 is a wasteful number, since it uses less digits than its factorization.

261096736164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6989720 (or 6989718 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 261096736164 in words is "two hundred sixty-one billion, ninety-six million, seven hundred thirty-six thousand, one hundred sixty-four".