61231647804 has 48 divisors (see below), whose sum is σ = 143479123200. Its totient is φ = 20324255616.

The previous prime is 61231647739. The next prime is 61231647817. The reversal of 61231647804 is 40874613216.

It is a congruent number.

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, 2932152 + ... + 2952960.

It is an arithmetic number, because the mean of its divisors is an integer number (2989148400).

Almost surely, 2^61231647804 is an apocalyptic number.

It is an amenable number.

61231647804 is an abundant number, since it is smaller than the sum of its proper divisors (82247475396).

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

61231647804 is a wasteful number, since it uses less digits than its factorization.

61231647804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21842 (or 21840 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 61231647804 in words is "sixty-one billion, two hundred thirty-one million, six hundred forty-seven thousand, eight hundred four".