8145976613 has 4 divisors (see below), whose sum is σ = 8169053388. Its totient is φ = 8122899840.

The previous prime is 8145976583. The next prime is 8145976667. The reversal of 8145976613 is 3166795418.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2866210369 + 5279766244 = 53537^2 + 72662^2 .

It is a cyclic number.

It is not a de Polignac number, because 8145976613 - 2⁶ = 8145976549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8145976673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11537858 + ... + 11538563.

It is an arithmetic number, because the mean of its divisors is an integer number (2042263347).

Almost surely, 2^8145976613 is an apocalyptic number.

It is an amenable number.

8145976613 is a deficient number, since it is larger than the sum of its proper divisors (23076775).

8145976613 is a wasteful number, since it uses less digits than its factorization.

8145976613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23076774.

The product of its digits is 1088640, while the sum is 50.

The square root of 8145976613 is about 90255.0641958666. The cubic root of 8145976613 is about 2012.0914686252.

The spelling of 8145976613 in words is "eight billion, one hundred forty-five million, nine hundred seventy-six thousand, six hundred thirteen".