51868448672 has 24 divisors (see below), whose sum is σ = 108122833476. Its totient is φ = 24408681472.

The previous prime is 51868448663. The next prime is 51868448719. The reversal of 51868448672 is 27684486815.

It can be written as a sum of positive squares in 2 ways, for example, as 43615816336 + 8252632336 = 208844^2 + 90844^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47672663 + ... + 47673750.

Almost surely, 2^51868448672 is an apocalyptic number.

It is an amenable number.

51868448672 is an abundant number, since it is smaller than the sum of its proper divisors (56254384804).

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

51868448672 is a wasteful number, since it uses less digits than its factorization.

51868448672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95346440 (or 95346432 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 59.

The spelling of 51868448672 in words is "fifty-one billion, eight hundred sixty-eight million, four hundred forty-eight thousand, six hundred seventy-two".