51630131121256 has 8 divisors (see below), whose sum is σ = 96806495852370. Its totient is φ = 25815065560624.

The previous prime is 51630131121229. The next prime is 51630131121277. The reversal of 51630131121256 is 65212113103615.

It can be written as a sum of positive squares in only one way, i.e., 25844717412900 + 25785413708356 = 5083770^2 + 5077934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3226883195071 + ... + 3226883195086.

Almost surely, 2^{51630131121256} is an apocalyptic number.

It is an amenable number.

51630131121256 is a deficient number, since it is larger than the sum of its proper divisors (45176364731114).

51630131121256 is a wasteful number, since it uses less digits than its factorization.

51630131121256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453766390163 (or 6453766390159 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 51630131121256 in words is "fifty-one trillion, six hundred thirty billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred fifty-six".