8156513879 has 4 divisors (see below), whose sum is σ = 8156732760. Its totient is φ = 8156295000.

The previous prime is 8156513873. The next prime is 8156513887. The reversal of 8156513879 is 9783156518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9783156518 = 2 ⋅4891578259.

It is a cyclic number.

It is not a de Polignac number, because 8156513879 - 2²⁰ = 8155465303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8156513879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8156513873) 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 3 ways as a sum of consecutive naturals, for example, 37997 + ... + 133254.

It is an arithmetic number, because the mean of its divisors is an integer number (2039183190).

Almost surely, 2^8156513879 is an apocalyptic number.

8156513879 is a deficient number, since it is larger than the sum of its proper divisors (218881).

8156513879 is a wasteful number, since it uses less digits than its factorization.

8156513879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218880.

The product of its digits is 1814400, while the sum is 53.

The square root of 8156513879 is about 90313.4202596713. The cubic root of 8156513879 is about 2012.9586782362.

The spelling of 8156513879 in words is "eight billion, one hundred fifty-six million, five hundred thirteen thousand, eight hundred seventy-nine".