61657444124 has 24 divisors (see below), whose sum is σ = 108406905600. Its totient is φ = 30684270960.

The previous prime is 61657444099. The next prime is 61657444213. The reversal of 61657444124 is 42144475616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076687 + ... + 1132505.

It is an arithmetic number, because the mean of its divisors is an integer number (4516954400).

Almost surely, 2^61657444124 is an apocalyptic number.

It is an amenable number.

61657444124 is a deficient number, since it is larger than the sum of its proper divisors (46749461476).

61657444124 is a wasteful number, since it uses less digits than its factorization.

61657444124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57113 (or 57111 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The spelling of 61657444124 in words is "sixty-one billion, six hundred fifty-seven million, four hundred forty-four thousand, one hundred twenty-four".