51630556220164 has 6 divisors (see below), whose sum is σ = 90353473385294. Its totient is φ = 25815278110080.

The previous prime is 51630556220141. The next prime is 51630556220213. The reversal of 51630556220164 is 46102265503615.

It can be written as a sum of positive squares in only one way, i.e., 49351187001600 + 2279369218564 = 7025040^2 + 1509758^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6453819527517 + ... + 6453819527524.

Almost surely, 2^{51630556220164} is an apocalyptic number.

It is an amenable number.

51630556220164 is a deficient number, since it is larger than the sum of its proper divisors (38722917165130).

51630556220164 is a wasteful number, since it uses less digits than its factorization.

51630556220164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12907639055045 (or 12907639055043 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 51630556220164 in words is "fifty-one trillion, six hundred thirty billion, five hundred fifty-six million, two hundred twenty thousand, one hundred sixty-four".