79148991864 has 16 divisors (see below), whose sum is σ = 197872479720. Its totient is φ = 26382997280.

The previous prime is 79148991863. The next prime is 79148991913. The reversal of 79148991864 is 46819984197.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 79148991795 and 79148991804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79148991863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648937307 + ... + 1648937354.

Almost surely, 2^79148991864 is an apocalyptic number.

It is an amenable number.

79148991864 is an abundant number, since it is smaller than the sum of its proper divisors (118723487856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79148991864 is a wasteful number, since it uses less digits than its factorization.

79148991864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297874670 (or 3297874666 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 66.

The spelling of 79148991864 in words is "seventy-nine billion, one hundred forty-eight million, nine hundred ninety-one thousand, eight hundred sixty-four".