261842592036 has 12 divisors (see below), whose sum is σ = 610966048112. Its totient is φ = 87280864008.

The previous prime is 261842592023. The next prime is 261842592047. The reversal of 261842592036 is 630295248162.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×261842592036² (a number of 24 digits) contains 22 as substring.

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, 10910107990 + ... + 10910108013.

Almost surely, 2^261842592036 is an apocalyptic number.

It is an amenable number.

261842592036 is an abundant number, since it is smaller than the sum of its proper divisors (349123456076).

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

261842592036 is a wasteful number, since it uses less digits than its factorization.

261842592036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820216010 (or 21820216008 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 261842592036 in words is "two hundred sixty-one billion, eight hundred forty-two million, five hundred ninety-two thousand, thirty-six".