8640191092 has 24 divisors (see below), whose sum is σ = 16526480096. Its totient is φ = 3928259808.

The previous prime is 8640191089. The next prime is 8640191093. The reversal of 8640191092 is 2901910468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640191093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236498 + ... + 1243465.

Almost surely, 2^8640191092 is an apocalyptic number.

It is an amenable number.

8640191092 is a deficient number, since it is larger than the sum of its proper divisors (7886289004).

8640191092 is a wasteful number, since it uses less digits than its factorization.

8640191092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480047 (or 2480045 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 8640191092 is about 92952.6282145911. The cubic root of 8640191092 is about 2051.9862638044.

The spelling of 8640191092 in words is "eight billion, six hundred forty million, one hundred ninety-one thousand, ninety-two".