65973831040 has 64 divisors (see below), whose sum is σ = 169850918160. Its totient is φ = 24359565312.

The previous prime is 65973831037. The next prime is 65973831083. The reversal of 65973831040 is 4013837956.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 3956454 + ... + 3973093.

Almost surely, 2^65973831040 is an apocalyptic number.

It is an amenable number.

65973831040 is an abundant number, since it is smaller than the sum of its proper divisors (103877087120).

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

65973831040 is a wasteful number, since it uses less digits than its factorization.

65973831040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929579 (or 7929567 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 65973831040 in words is "sixty-five billion, nine hundred seventy-three million, eight hundred thirty-one thousand, forty".