79031866917 has 32 divisors (see below), whose sum is σ = 112023100800. Its totient is φ = 49421242368.

The previous prime is 79031866889. The next prime is 79031866987. The reversal of 79031866917 is 71966813097.

It is not a de Polignac number, because 79031866917 - 2⁷ = 79031866789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79031866987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3024693 + ... + 3050709.

It is an arithmetic number, because the mean of its divisors is an integer number (3500721900).

Almost surely, 2^79031866917 is an apocalyptic number.

It is an amenable number.

79031866917 is a deficient number, since it is larger than the sum of its proper divisors (32991233883).

79031866917 is a wasteful number, since it uses less digits than its factorization.

79031866917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26565.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 79031866917 in words is "seventy-nine billion, thirty-one million, eight hundred sixty-six thousand, nine hundred seventeen".