261766385596 has 24 divisors (see below), whose sum is σ = 458827903520. Its totient is φ = 130672827072.

The previous prime is 261766385561. The next prime is 261766385599. The reversal of 261766385596 is 695583667162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261766385599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9193510 + ... + 9221938.

Almost surely, 2^261766385596 is an apocalyptic number.

It is an amenable number.

261766385596 is a deficient number, since it is larger than the sum of its proper divisors (197061517924).

261766385596 is a wasteful number, since it uses less digits than its factorization.

261766385596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32053 (or 32051 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 64.

The spelling of 261766385596 in words is "two hundred sixty-one billion, seven hundred sixty-six million, three hundred eighty-five thousand, five hundred ninety-six".