51365666530633 has 16 divisors (see below), whose sum is σ = 63219599372160. Its totient is φ = 40640762825856.

The previous prime is 51365666530603. The next prime is 51365666530681. The reversal of 51365666530633 is 33603566656315.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51365666530633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51365666530603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18301533 + ... + 20920741.

It is an arithmetic number, because the mean of its divisors is an integer number (3951224960760).

Almost surely, 2^{51365666530633} is an apocalyptic number.

It is an amenable number.

51365666530633 is a deficient number, since it is larger than the sum of its proper divisors (11853932841527).

51365666530633 is a wasteful number, since it uses less digits than its factorization.

51365666530633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834736.

The product of its (nonzero) digits is 78732000, while the sum is 58.

The spelling of 51365666530633 in words is "fifty-one trillion, three hundred sixty-five billion, six hundred sixty-six million, five hundred thirty thousand, six hundred thirty-three".