9131557121629 has 2 divisors, whose sum is σ = 9131557121630. Its totient is φ = 9131557121628.

The previous prime is 9131557121563. The next prime is 9131557121669. The reversal of 9131557121629 is 9261217551319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7443566324100 + 1687990797529 = 2728290^2 + 1299227^2 .

It is a cyclic number.

It is not a de Polignac number, because 9131557121629 - 2¹⁵ = 9131557088861 is a prime.

It is a super-2 number, since 2×9131557121629² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9131557121669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565778560814 + 4565778560815.

It is an arithmetic number, because the mean of its divisors is an integer number (4565778560815).

Almost surely, 2^{9131557121629} is an apocalyptic number.

It is an amenable number.

9131557121629 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131557121629 is an equidigital number, since it uses as much as digits as its factorization.

9131557121629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 52.

The spelling of 9131557121629 in words is "nine trillion, one hundred thirty-one billion, five hundred fifty-seven million, one hundred twenty-one thousand, six hundred twenty-nine".