61712617772 has 12 divisors (see below), whose sum is σ = 116304548976. Its totient is φ = 28482746640.

The previous prime is 61712617763. The next prime is 61712617781. The reversal of 61712617772 is 27771621716.

It is an interprime number because it is at equal distance from previous prime (61712617763) and next prime (61712617781).

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, 593390504 + ... + 593390607.

It is an arithmetic number, because the mean of its divisors is an integer number (9692045748).

Almost surely, 2^61712617772 is an apocalyptic number.

It is an amenable number.

61712617772 is a deficient number, since it is larger than the sum of its proper divisors (54591931204).

61712617772 is a wasteful number, since it uses less digits than its factorization.

61712617772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186781128 (or 1186781126 counting only the distinct ones).

The product of its digits is 345744, while the sum is 47.

The spelling of 61712617772 in words is "sixty-one billion, seven hundred twelve million, six hundred seventeen thousand, seven hundred seventy-two".