61956187058168 has 32 divisors (see below), whose sum is σ = 126088908879360. Its totient is φ = 28370004485760.

The previous prime is 61956187058167. The next prime is 61956187058191. The reversal of 61956187058168 is 86185078165916.

It is a super-2 number, since 2×61956187058168² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61956187058167) 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, 2345390603 + ... + 2345417018.

It is an arithmetic number, because the mean of its divisors is an integer number (3940278402480).

Almost surely, 2^{61956187058168} is an apocalyptic number.

It is an amenable number.

61956187058168 is an abundant number, since it is smaller than the sum of its proper divisors (64132721821192).

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

61956187058168 is a wasteful number, since it uses less digits than its factorization.

61956187058168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690807767 (or 4690807763 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 71.

The spelling of 61956187058168 in words is "sixty-one trillion, nine hundred fifty-six billion, one hundred eighty-seven million, fifty-eight thousand, one hundred sixty-eight".