2931157538809 has 24 divisors (see below), whose sum is σ = 3157596570240. Its totient is φ = 2719741730400.

The previous prime is 2931157538801. The next prime is 2931157538887. The reversal of 2931157538809 is 9088357511392.

It is not a de Polignac number, because 2931157538809 - 2³ = 2931157538801 is a prime.

It is a super-2 number, since 2×2931157538809² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2931157538801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5518119 + ... + 6025939.

It is an arithmetic number, because the mean of its divisors is an integer number (131566523760).

Almost surely, 2^{2931157538809} is an apocalyptic number.

It is an amenable number.

2931157538809 is a deficient number, since it is larger than the sum of its proper divisors (226439031431).

2931157538809 is a wasteful number, since it uses less digits than its factorization.

2931157538809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508189 (or 508170 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 2931157538809 in words is "two trillion, nine hundred thirty-one billion, one hundred fifty-seven million, five hundred thirty-eight thousand, eight hundred nine".