9791640649131 has 64 divisors (see below), whose sum is σ = 15409038766080. Its totient is φ = 5465833914240.

The previous prime is 9791640649129. The next prime is 9791640649157. The reversal of 9791640649131 is 1319460461979.

It is not a de Polignac number, because 9791640649131 - 2¹ = 9791640649129 is a prime.

It is a super-2 number, since 2×9791640649131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9791640609131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30066336 + ... + 30390258.

It is an arithmetic number, because the mean of its divisors is an integer number (240766230720).

Almost surely, 2^{9791640649131} is an apocalyptic number.

9791640649131 is a deficient number, since it is larger than the sum of its proper divisors (5617398116949).

9791640649131 is a wasteful number, since it uses less digits than its factorization.

9791640649131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325296.

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 9791640649131 in words is "nine trillion, seven hundred ninety-one billion, six hundred forty million, six hundred forty-nine thousand, one hundred thirty-one".