51147194688576 has 84 divisors (see below), whose sum is σ = 167547655629952. Its totient is φ = 14613484195584.

The previous prime is 51147194688571. The next prime is 51147194688587. The reversal of 51147194688576 is 67588649174115.

It is a happy number.

51147194688576 is a `hidden beast` number, since 5 + 1 + 1 + 4 + 7 + 1 + 9 + 46 + 8 + 8 + 576 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×51147194688576² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (51147194688571) 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 in 11 ways as a sum of consecutive naturals, for example, 6342654040 + ... + 6342662103.

Almost surely, 2^{51147194688576} is an apocalyptic number.

51147194688576 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51147194688576 is an abundant number, since it is smaller than the sum of its proper divisors (116400460941376).

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

51147194688576 is a wasteful number, since it uses less digits than its factorization.

51147194688576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12685316168 (or 12685316155 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 72.

The spelling of 51147194688576 in words is "fifty-one trillion, one hundred forty-seven billion, one hundred ninety-four million, six hundred eighty-eight thousand, five hundred seventy-six".