51156097537 has 2 divisors, whose sum is σ = 51156097538. Its totient is φ = 51156097536.

The previous prime is 51156097501. The next prime is 51156097609. The reversal of 51156097537 is 73579065115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42809265216 + 8346832321 = 206904^2 + 91361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51156097537 is a prime.

It is not a weakly prime, because it can be changed into another prime (51156091537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25578048768 + 25578048769.

It is an arithmetic number, because the mean of its divisors is an integer number (25578048769).

Almost surely, 2^51156097537 is an apocalyptic number.

It is an amenable number.

51156097537 is a deficient number, since it is larger than the sum of its proper divisors (1).

51156097537 is an equidigital number, since it uses as much as digits as its factorization.

51156097537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 992250, while the sum is 49.

The spelling of 51156097537 in words is "fifty-one billion, one hundred fifty-six million, ninety-seven thousand, five hundred thirty-seven".