65561401692 has 36 divisors (see below), whose sum is σ = 166592340096. Its totient is φ = 21739380480.

The previous prime is 65561401673. The next prime is 65561401771. The reversal of 65561401692 is 29610416556.

65561401692 is a `hidden beast` number, since 6 + 556 + 1 + 4 + 0 + 1 + 6 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4760533 + ... + 4774284.

Almost surely, 2^65561401692 is an apocalyptic number.

It is an amenable number.

65561401692 is an abundant number, since it is smaller than the sum of its proper divisors (101030938404).

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

65561401692 is a wasteful number, since it uses less digits than its factorization.

65561401692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535018 (or 9535013 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 65561401692 in words is "sixty-five billion, five hundred sixty-one million, four hundred one thousand, six hundred ninety-two".