7990158891 has 96 divisors (see below), whose sum is σ = 13131360256. Its totient is φ = 4288204800.

The previous prime is 7990158889. The next prime is 7990158893. The reversal of 7990158891 is 1988510997.

It is an interprime number because it is at equal distance from previous prime (7990158889) and next prime (7990158893).

It is not a de Polignac number, because 7990158891 - 2¹ = 7990158889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7990158893) 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, 28233636 + ... + 28233918.

Almost surely, 2^7990158891 is an apocalyptic number.

7990158891 is a deficient number, since it is larger than the sum of its proper divisors (5141201365).

7990158891 is a wasteful number, since it uses less digits than its factorization.

7990158891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 57.

The square root of 7990158891 is about 89387.6886992834. The cubic root of 7990158891 is about 1999.1795710775.

The spelling of 7990158891 in words is "seven billion, nine hundred ninety million, one hundred fifty-eight thousand, eight hundred ninety-one".