61712155156 has 24 divisors (see below), whose sum is σ = 110645305344. Its totient is φ = 30099414720.

The previous prime is 61712155139. The next prime is 61712155189. The reversal of 61712155156 is 65155121716.

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, 1448941 + ... + 1490923.

It is an arithmetic number, because the mean of its divisors is an integer number (4610221056).

Almost surely, 2^61712155156 is an apocalyptic number.

It is an amenable number.

61712155156 is a deficient number, since it is larger than the sum of its proper divisors (48933150188).

61712155156 is a wasteful number, since it uses less digits than its factorization.

61712155156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50991 (or 50989 counting only the distinct ones).

The product of its digits is 63000, while the sum is 40.

The spelling of 61712155156 in words is "sixty-one billion, seven hundred twelve million, one hundred fifty-five thousand, one hundred fifty-six".