8691377221131 has 96 divisors (see below), whose sum is σ = 12938510204928. Its totient is φ = 5185323000000.

The previous prime is 8691377221069. The next prime is 8691377221157. The reversal of 8691377221131 is 1311227731968.

It is not a de Polignac number, because 8691377221131 - 2⁷ = 8691377221003 is a prime.

It is a super-2 number, since 2×8691377221131² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8691376221131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3234601270 + ... + 3234603956.

It is an arithmetic number, because the mean of its divisors is an integer number (134776147968).

Almost surely, 2^{8691377221131} is an apocalyptic number.

8691377221131 is a deficient number, since it is larger than the sum of its proper divisors (4247132983797).

8691377221131 is a wasteful number, since it uses less digits than its factorization.

8691377221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365 (or 3354 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The spelling of 8691377221131 in words is "eight trillion, six hundred ninety-one billion, three hundred seventy-seven million, two hundred twenty-one thousand, one hundred thirty-one".