9131561729125 has 32 divisors (see below), whose sum is σ = 12432815890560. Its totient is φ = 6640810128000.

The previous prime is 9131561729107. The next prime is 9131561729131. The reversal of 9131561729125 is 5219271651319.

It is not a de Polignac number, because 9131561729125 - 2²⁹ = 9131024858213 is a prime.

It is a super-2 number, since 2×9131561729125² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29904217 + ... + 30208033.

It is an arithmetic number, because the mean of its divisors is an integer number (388525496580).

Almost surely, 2^{9131561729125} is an apocalyptic number.

It is an amenable number.

9131561729125 is a deficient number, since it is larger than the sum of its proper divisors (3301254161435).

9131561729125 is a wasteful number, since it uses less digits than its factorization.

9131561729125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325702 (or 325692 counting only the distinct ones).

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

The spelling of 9131561729125 in words is "nine trillion, one hundred thirty-one billion, five hundred sixty-one million, seven hundred twenty-nine thousand, one hundred twenty-five".