8157889089 has 24 divisors (see below), whose sum is σ = 13552784960. Its totient is φ = 4631953248.

The previous prime is 8157889073. The next prime is 8157889099. The reversal of 8157889089 is 9809887518.

It is not a de Polignac number, because 8157889089 - 2⁴ = 8157889073 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8157889099) 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, 402499 + ... + 422280.

Almost surely, 2^8157889089 is an apocalyptic number.

It is an amenable number.

8157889089 is a deficient number, since it is larger than the sum of its proper divisors (5394895871).

8157889089 is a wasteful number, since it uses less digits than its factorization.

8157889089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824949 (or 824946 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 63.

The square root of 8157889089 is about 90321.0334805797. The cubic root of 8157889089 is about 2013.0718019465.

The spelling of 8157889089 in words is "eight billion, one hundred fifty-seven million, eight hundred eighty-nine thousand, eighty-nine".