51637904056 has 32 divisors (see below), whose sum is σ = 107912034000. Its totient is φ = 23021231616.

The previous prime is 51637904011. The next prime is 51637904057. The reversal of 51637904056 is 65040973615.

51637904056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51637904056² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51637903997 and 51637904015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51637904057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9989271 + ... + 9994438.

Almost surely, 2^51637904056 is an apocalyptic number.

It is an amenable number.

51637904056 is an abundant number, since it is smaller than the sum of its proper divisors (56274129944).

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

51637904056 is a wasteful number, since it uses less digits than its factorization.

51637904056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19983751 (or 19983747 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 51637904056 in words is "fifty-one billion, six hundred thirty-seven million, nine hundred four thousand, fifty-six".