8402804991 has 24 divisors (see below), whose sum is σ = 13972561824. Its totient is φ = 4766549760.

The previous prime is 8402804987. The next prime is 8402805031. The reversal of 8402804991 is 1994082048.

8402804991 is a `hidden beast` number, since 84 + 0 + 2 + 80 + 499 + 1 = 666.

It is not a de Polignac number, because 8402804991 - 2² = 8402804987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8402804791) 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, 478150 + ... + 495411.

It is an arithmetic number, because the mean of its divisors is an integer number (582190076).

Almost surely, 2^8402804991 is an apocalyptic number.

8402804991 is a deficient number, since it is larger than the sum of its proper divisors (5569756833).

8402804991 is a wasteful number, since it uses less digits than its factorization.

8402804991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973711 (or 973708 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 8402804991 is about 91666.8151023041. The cubic root of 8402804991 is about 2033.0189569116.

The spelling of 8402804991 in words is "eight billion, four hundred two million, eight hundred four thousand, nine hundred ninety-one".