79149688837855 has 4 divisors (see below), whose sum is σ = 94979626605432. Its totient is φ = 63319751070280.

The previous prime is 79149688837841. The next prime is 79149688837873. The reversal of 79149688837855 is 55873888694197.

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

It is not a de Polignac number, because 79149688837855 - 2²³ = 79149680449247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7914968883781 + ... + 7914968883790.

It is an arithmetic number, because the mean of its divisors is an integer number (23744906651358).

Almost surely, 2^{79149688837855} is an apocalyptic number.

79149688837855 is a deficient number, since it is larger than the sum of its proper divisors (15829937767577).

79149688837855 is a wasteful number, since it uses less digits than its factorization.

79149688837855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15829937767576.

The product of its digits is 29262643200, while the sum is 88.

The spelling of 79149688837855 in words is "seventy-nine trillion, one hundred forty-nine billion, six hundred eighty-eight million, eight hundred thirty-seven thousand, eight hundred fifty-five".