61964375331988 has 12 divisors (see below), whose sum is σ = 109217783859520. Its totient is φ = 30759294229272.

The previous prime is 61964375331983. The next prime is 61964375332019. The reversal of 61964375331988 is 88913357346916.

It is a self number, because there is not a number n which added to its sum of digits gives 61964375331988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61964375331983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55723358556 + ... + 55723359667.

Almost surely, 2^{61964375331988} is an apocalyptic number.

It is an amenable number.

61964375331988 is a deficient number, since it is larger than the sum of its proper divisors (47253408527532).

61964375331988 is a wasteful number, since it uses less digits than its factorization.

61964375331988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111446718366 (or 111446718364 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 73.

The spelling of 61964375331988 in words is "sixty-one trillion, nine hundred sixty-four billion, three hundred seventy-five million, three hundred thirty-one thousand, nine hundred eighty-eight".