61012017156 has 24 divisors (see below), whose sum is σ = 142672899040. Its totient is φ = 20292835392.

The previous prime is 61012017151. The next prime is 61012017163. The reversal of 61012017156 is 65171021016.

It is a super-5 number, since 5×61012017156⁵ (a number of 55 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (61012017151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5557246 + ... + 5568213.

Almost surely, 2^61012017156 is an apocalyptic number.

It is an amenable number.

61012017156 is an abundant number, since it is smaller than the sum of its proper divisors (81660881884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61012017156 is a wasteful number, since it uses less digits than its factorization.

61012017156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11125923 (or 11125921 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 61012017156 in words is "sixty-one billion, twelve million, seventeen thousand, one hundred fifty-six".