261153597058776 has 96 divisors (see below), whose sum is σ = 707559417321120. Its totient is φ = 87018167808000.

The previous prime is 261153597058751. The next prime is 261153597058789. The reversal of 261153597058776 is 677850795351162.

261153597058776 is a `hidden beast` number, since 2 + 6 + 1 + 1 + 5 + 35 + 9 + 7 + 0 + 587 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2436057976 + ... + 2436165176.

It is an arithmetic number, because the mean of its divisors is an integer number (7370410597095).

Almost surely, 2^{261153597058776} is an apocalyptic number.

It is an amenable number.

261153597058776 is an abundant number, since it is smaller than the sum of its proper divisors (446405820262344).

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

261153597058776 is a wasteful number, since it uses less digits than its factorization.

261153597058776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119737 (or 119730 counting only the distinct ones).

The product of its (nonzero) digits is 666792000, while the sum is 72.

The spelling of 261153597058776 in words is "two hundred sixty-one trillion, one hundred fifty-three billion, five hundred ninety-seven million, fifty-eight thousand, seven hundred seventy-six".