61944699936 has 48 divisors (see below), whose sum is σ = 185834101824. Its totient is φ = 17698485504.

The previous prime is 61944699893. The next prime is 61944699941. The reversal of 61944699936 is 63999644916.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×61944699936² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46089135 + ... + 46090478.

It is an arithmetic number, because the mean of its divisors is an integer number (3871543788).

Almost surely, 2^61944699936 is an apocalyptic number.

It is an amenable number.

61944699936 is an abundant number, since it is smaller than the sum of its proper divisors (123889401888).

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

61944699936 is a wasteful number, since it uses less digits than its factorization.

61944699936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92179633 (or 92179625 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 66.

The spelling of 61944699936 in words is "sixty-one billion, nine hundred forty-four million, six hundred ninety-nine thousand, nine hundred thirty-six".