31129097156 has 12 divisors (see below), whose sum is σ = 55742802192. Its totient is φ = 15202582248.

The previous prime is 31129097141. The next prime is 31129097173. The reversal of 31129097156 is 65179092113.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 90491390 + ... + 90491733.

It is an arithmetic number, because the mean of its divisors is an integer number (4645233516).

Almost surely, 2^31129097156 is an apocalyptic number.

It is an amenable number.

31129097156 is a deficient number, since it is larger than the sum of its proper divisors (24613705036).

31129097156 is a wasteful number, since it uses less digits than its factorization.

31129097156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180983170 (or 180983168 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 31129097156 in words is "thirty-one billion, one hundred twenty-nine million, ninety-seven thousand, one hundred fifty-six".