9509972935491 has 64 divisors (see below), whose sum is σ = 16270249282560. Its totient is φ = 5377581722880.

The previous prime is 9509972935483. The next prime is 9509972935579. The reversal of 9509972935491 is 1945392799059.

9509972935491 is a `hidden beast` number, since 9 + 5 + 0 + 9 + 9 + 72 + 9 + 3 + 549 + 1 = 666.

It is not a de Polignac number, because 9509972935491 - 2³ = 9509972935483 is a prime.

It is a super-2 number, since 2×9509972935491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9509972935391) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 7628776 + ... + 8787386.

It is an arithmetic number, because the mean of its divisors is an integer number (254222645040).

Almost surely, 2^{9509972935491} is an apocalyptic number.

9509972935491 is a deficient number, since it is larger than the sum of its proper divisors (6760276347069).

9509972935491 is a wasteful number, since it uses less digits than its factorization.

9509972935491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159081 (or 1159075 counting only the distinct ones).

The product of its (nonzero) digits is 248005800, while the sum is 72.

The spelling of 9509972935491 in words is "nine trillion, five hundred nine billion, nine hundred seventy-two million, nine hundred thirty-five thousand, four hundred ninety-one".