51112206657 has 12 divisors (see below), whose sum is σ = 76563141200. Its totient is φ = 34074804276.

The previous prime is 51112206631. The next prime is 51112206683. The reversal of 51112206657 is 75660221115.

51112206657 is a `hidden beast` number, since 511 + 12 + 20 + 66 + 57 = 666.

It is an interprime number because it is at equal distance from previous prime (51112206631) and next prime (51112206683).

It is not a de Polignac number, because 51112206657 - 2⁷ = 51112206529 is a prime.

It is a super-2 number, since 2×51112206657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51112206617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105168907 + ... + 105169392.

Almost surely, 2^51112206657 is an apocalyptic number.

It is an amenable number.

51112206657 is a deficient number, since it is larger than the sum of its proper divisors (25450934543).

51112206657 is an equidigital number, since it uses as much as digits as its factorization.

51112206657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210338314 (or 210338302 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 51112206657 in words is "fifty-one billion, one hundred twelve million, two hundred six thousand, six hundred fifty-seven".