8157122659 has 12 divisors (see below), whose sum is σ = 9794993088. Its totient is φ = 6766275600.

The previous prime is 8157122653. The next prime is 8157122671. The reversal of 8157122659 is 9562217518.

It is not a de Polignac number, because 8157122659 - 2⁵ = 8157122627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8157122653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2683512 + ... + 2686549.

It is an arithmetic number, because the mean of its divisors is an integer number (816249424).

Almost surely, 2^8157122659 is an apocalyptic number.

8157122659 is a deficient number, since it is larger than the sum of its proper divisors (1637870429).

8157122659 is a wasteful number, since it uses less digits than its factorization.

8157122659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370106 (or 5370099 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 8157122659 is about 90316.7905707460. The cubic root of 8157122659 is about 2013.0087575762.

It can be divided in two parts, 8157 and 122659, that added together give a triangular number (130816 = T₅₁₁).

The spelling of 8157122659 in words is "eight billion, one hundred fifty-seven million, one hundred twenty-two thousand, six hundred fifty-nine".