51125632637 has 2 divisors, whose sum is σ = 51125632638. Its totient is φ = 51125632636.

The previous prime is 51125632633. The next prime is 51125632661. The reversal of 51125632637 is 73623652115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31180849561 + 19944783076 = 176581^2 + 141226^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125632637 - 2² = 51125632633 is a prime.

It is a super-2 number, since 2×51125632637² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51125632594 and 51125632603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51125632633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25562816318 + 25562816319.

It is an arithmetic number, because the mean of its divisors is an integer number (25562816319).

Almost surely, 2^51125632637 is an apocalyptic number.

It is an amenable number.

51125632637 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125632637 is an equidigital number, since it uses as much as digits as its factorization.

51125632637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The spelling of 51125632637 in words is "fifty-one billion, one hundred twenty-five million, six hundred thirty-two thousand, six hundred thirty-seven".