61415745764 has 12 divisors (see below), whose sum is σ = 107480153088. Its totient is φ = 30707130600.

The previous prime is 61415745731. The next prime is 61415745817. The reversal of 61415745764 is 46754751416.

61415745764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 27869 + ... + 351579.

It is an arithmetic number, because the mean of its divisors is an integer number (8956679424).

Almost surely, 2^61415745764 is an apocalyptic number.

It is an amenable number.

61415745764 is a deficient number, since it is larger than the sum of its proper divisors (46064407324).

61415745764 is a wasteful number, since it uses less digits than its factorization.

61415745764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371146 (or 371144 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 50.

The spelling of 61415745764 in words is "sixty-one billion, four hundred fifteen million, seven hundred forty-five thousand, seven hundred sixty-four".