61397958916 has 12 divisors (see below), whose sum is σ = 122795917888. Its totient is φ = 26313410952.

The previous prime is 61397958901. The next prime is 61397959003. The reversal of 61397958916 is 61985979316.

It is a happy number.

61397958916 is an admirable number.

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, 1096392096 + ... + 1096392151.

Almost surely, 2^61397958916 is an apocalyptic number.

It is an amenable number.

61397958916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61397958916 is a wasteful number, since it uses less digits than its factorization.

61397958916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192784258 (or 2192784256 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 64.

The spelling of 61397958916 in words is "sixty-one billion, three hundred ninety-seven million, nine hundred fifty-eight thousand, nine hundred sixteen".