65928971992 has 32 divisors (see below), whose sum is σ = 137420196480. Its totient is φ = 29447182080.

The previous prime is 65928971981. The next prime is 65928972007. The reversal of 65928971992 is 29917982956.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 10221493 + ... + 10227940.

It is an arithmetic number, because the mean of its divisors is an integer number (4294381140).

Almost surely, 2^65928971992 is an apocalyptic number.

65928971992 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

65928971992 is an abundant number, since it is smaller than the sum of its proper divisors (71491224488).

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

65928971992 is a wasteful number, since it uses less digits than its factorization.

65928971992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20449483 (or 20449479 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 67.

The spelling of 65928971992 in words is "sixty-five billion, nine hundred twenty-eight million, nine hundred seventy-one thousand, nine hundred ninety-two".