7993641854 has 16 divisors (see below), whose sum is σ = 13238104320. Its totient is φ = 3589695960.

The previous prime is 7993641853. The next prime is 7993641871. The reversal of 7993641854 is 4581463997.

It is a self number, because there is not a number n which added to its sum of digits gives 7993641854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993641853) 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, 2187014 + ... + 2190665.

It is an arithmetic number, because the mean of its divisors is an integer number (827381520).

Almost surely, 2^7993641854 is an apocalyptic number.

7993641854 is a deficient number, since it is larger than the sum of its proper divisors (5244462466).

7993641854 is a wasteful number, since it uses less digits than its factorization.

7993641854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377775.

The product of its digits is 6531840, while the sum is 56.

The square root of 7993641854 is about 89407.1689183815. The cubic root of 7993641854 is about 1999.4700140699.

The spelling of 7993641854 in words is "seven billion, nine hundred ninety-three million, six hundred forty-one thousand, eight hundred fifty-four".