61565111164 has 6 divisors (see below), whose sum is σ = 107738944544. Its totient is φ = 30782555580.

The previous prime is 61565111161. The next prime is 61565111173. The reversal of 61565111164 is 46111156516.

61565111164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61565111161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7695638892 + ... + 7695638899.

Almost surely, 2^61565111164 is an apocalyptic number.

It is an amenable number.

61565111164 is a deficient number, since it is larger than the sum of its proper divisors (46173833380).

61565111164 is a wasteful number, since it uses less digits than its factorization.

61565111164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391277795 (or 15391277793 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The spelling of 61565111164 in words is "sixty-one billion, five hundred sixty-five million, one hundred eleven thousand, one hundred sixty-four".