51720876444 has 24 divisors (see below), whose sum is σ = 120861383440. Its totient is φ = 17214672384.

The previous prime is 51720876401. The next prime is 51720876451. The reversal of 51720876444 is 44467802715.

51720876444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51720876393 and 51720876402.

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, 3194059 + ... + 3210210.

Almost surely, 2^51720876444 is an apocalyptic number.

It is an amenable number.

51720876444 is an abundant number, since it is smaller than the sum of its proper divisors (69140506996).

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

51720876444 is a wasteful number, since it uses less digits than its factorization.

51720876444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404949 (or 6404947 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 48.

The spelling of 51720876444 in words is "fifty-one billion, seven hundred twenty million, eight hundred seventy-six thousand, four hundred forty-four".