125499156637 has 2 divisors, whose sum is σ = 125499156638. Its totient is φ = 125499156636.

The previous prime is 125499156619. The next prime is 125499156659. The reversal of 125499156637 is 736651994521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123806163321 + 1692993316 = 351861^2 + 41146^2 .

It is an emirp because it is prime and its reverse (736651994521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125499156637 - 2¹¹ = 125499154589 is a prime.

It is a super-2 number, since 2×125499156637² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125499156697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62749578318 + 62749578319.

It is an arithmetic number, because the mean of its divisors is an integer number (62749578319).

Almost surely, 2^125499156637 is an apocalyptic number.

It is an amenable number.

125499156637 is a deficient number, since it is larger than the sum of its proper divisors (1).

125499156637 is an equidigital number, since it uses as much as digits as its factorization.

125499156637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 58.

The spelling of 125499156637 in words is "one hundred twenty-five billion, four hundred ninety-nine million, one hundred fifty-six thousand, six hundred thirty-seven".