51664100056 has 16 divisors (see below), whose sum is σ = 96900630840. Its totient is φ = 25823931840.

The previous prime is 51664100029. The next prime is 51664100101. The reversal of 51664100056 is 65000146615.

It is a happy number.

51664100056 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 = 51664099994 and 51664100030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987685 + ... + 1038676.

Almost surely, 2^51664100056 is an apocalyptic number.

It is an amenable number.

51664100056 is a deficient number, since it is larger than the sum of its proper divisors (45236530784).

51664100056 is a wasteful number, since it uses less digits than its factorization.

51664100056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029554 (or 2029550 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 51664100056 in words is "fifty-one billion, six hundred sixty-four million, one hundred thousand, fifty-six".