79153646939 has 4 divisors (see below), whose sum is σ = 79563769656. Its totient is φ = 78743524224.

The previous prime is 79153646921. The next prime is 79153647007. The reversal of 79153646939 is 93964635197.

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

It is a cyclic number.

It is not a de Polignac number, because 79153646939 - 2²⁰ = 79152598363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79153640939) 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, 205061069 + ... + 205061454.

It is an arithmetic number, because the mean of its divisors is an integer number (19890942414).

Almost surely, 2^79153646939 is an apocalyptic number.

79153646939 is a deficient number, since it is larger than the sum of its proper divisors (410122717).

79153646939 is a wasteful number, since it uses less digits than its factorization.

79153646939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410122716.

The product of its digits is 33067440, while the sum is 62.

The spelling of 79153646939 in words is "seventy-nine billion, one hundred fifty-three million, six hundred forty-six thousand, nine hundred thirty-nine".