61931613916 has 6 divisors (see below), whose sum is σ = 108380324360. Its totient is φ = 30965806956.

The previous prime is 61931613893. The next prime is 61931613917.

61931613916 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61931613917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7741451736 + ... + 7741451743.

Almost surely, 2^61931613916 is an apocalyptic number.

It is an amenable number.

61931613916 is a deficient number, since it is larger than the sum of its proper divisors (46448710444).

61931613916 is a wasteful number, since it uses less digits than its factorization.

61931613916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482903483 (or 15482903481 counting only the distinct ones).

The product of its digits is 157464, while the sum is 46.

The spelling of 61931613916 in words is "sixty-one billion, nine hundred thirty-one million, six hundred thirteen thousand, nine hundred sixteen".