51764919992 has 8 divisors (see below), whose sum is σ = 97059225000. Its totient is φ = 25882459992.

The previous prime is 51764919977. The next prime is 51764920001. The reversal of 51764919992 is 29991946715.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×51764919992² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3235307492 + ... + 3235307507.

It is an arithmetic number, because the mean of its divisors is an integer number (12132403125).

Almost surely, 2^51764919992 is an apocalyptic number.

It is an amenable number.

51764919992 is a deficient number, since it is larger than the sum of its proper divisors (45294305008).

51764919992 is a wasteful number, since it uses less digits than its factorization.

51764919992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470615005 (or 6470615001 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 62.

The spelling of 51764919992 in words is "fifty-one billion, seven hundred sixty-four million, nine hundred nineteen thousand, nine hundred ninety-two".