79863900513 has 4 divisors (see below), whose sum is σ = 106485200688. Its totient is φ = 53242600340.

The previous prime is 79863900503. The next prime is 79863900539. The reversal of 79863900513 is 31500936897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79863900513 - 2⁴ = 79863900497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79863900503) 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, 13310650083 + ... + 13310650088.

It is an arithmetic number, because the mean of its divisors is an integer number (26621300172).

Almost surely, 2^79863900513 is an apocalyptic number.

It is an amenable number.

79863900513 is a deficient number, since it is larger than the sum of its proper divisors (26621300175).

79863900513 is a wasteful number, since it uses less digits than its factorization.

79863900513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26621300174.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 79863900513 in words is "seventy-nine billion, eight hundred sixty-three million, nine hundred thousand, five hundred thirteen".