61367632864 has 24 divisors (see below), whose sum is σ = 124082868168. Its totient is φ = 29854523520.

The previous prime is 61367632849. The next prime is 61367632913. The reversal of 61367632864 is 46823676316.

61367632864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 25914202 + ... + 25916569.

It is an arithmetic number, because the mean of its divisors is an integer number (5170119507).

Almost surely, 2^61367632864 is an apocalyptic number.

It is an amenable number.

61367632864 is an abundant number, since it is smaller than the sum of its proper divisors (62715235304).

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

61367632864 is a wasteful number, since it uses less digits than its factorization.

61367632864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51830818 (or 51830810 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 52.

The spelling of 61367632864 in words is "sixty-one billion, three hundred sixty-seven million, six hundred thirty-two thousand, eight hundred sixty-four".