79643617539 has 8 divisors (see below), whose sum is σ = 106204131072. Its totient is φ = 53089424520.

The previous prime is 79643617513. The next prime is 79643617561. The reversal of 79643617539 is 93571634697.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79643617539 - 2²⁰ = 79642568963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79643617639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550647 + ... + 1601184.

It is an arithmetic number, because the mean of its divisors is an integer number (13275516384).

Almost surely, 2^79643617539 is an apocalyptic number.

79643617539 is a deficient number, since it is larger than the sum of its proper divisors (26560513533).

79643617539 is a wasteful number, since it uses less digits than its factorization.

79643617539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160257.

The product of its digits is 25719120, while the sum is 60.

The spelling of 79643617539 in words is "seventy-nine billion, six hundred forty-three million, six hundred seventeen thousand, five hundred thirty-nine".