61945913164 has 6 divisors (see below), whose sum is σ = 108405348044. Its totient is φ = 30972956580.

The previous prime is 61945913143. The next prime is 61945913167. The reversal of 61945913164 is 46131954916.

It is not an unprimeable number, because it can be changed into a prime (61945913167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7743239142 + ... + 7743239149.

Almost surely, 2^61945913164 is an apocalyptic number.

It is an amenable number.

61945913164 is a deficient number, since it is larger than the sum of its proper divisors (46459434880).

61945913164 is a wasteful number, since it uses less digits than its factorization.

61945913164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15486478295 (or 15486478293 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 61945913164 in words is "sixty-one billion, nine hundred forty-five million, nine hundred thirteen thousand, one hundred sixty-four".