51507470537 has 2 divisors, whose sum is σ = 51507470538. Its totient is φ = 51507470536.

The previous prime is 51507470473. The next prime is 51507470561. The reversal of 51507470537 is 73507470515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44398282681 + 7109187856 = 210709^2 + 84316^2 .

It is a cyclic number.

It is not a de Polignac number, because 51507470537 - 2⁶ = 51507470473 is a prime.

It is a super-2 number, since 2×51507470537² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51507479537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25753735268 + 25753735269.

It is an arithmetic number, because the mean of its divisors is an integer number (25753735269).

Almost surely, 2^51507470537 is an apocalyptic number.

It is an amenable number.

51507470537 is a deficient number, since it is larger than the sum of its proper divisors (1).

51507470537 is an equidigital number, since it uses as much as digits as its factorization.

51507470537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 514500, while the sum is 44.

The spelling of 51507470537 in words is "fifty-one billion, five hundred seven million, four hundred seventy thousand, five hundred thirty-seven".