78197365679 has 8 divisors (see below), whose sum is σ = 78454293888. Its totient is φ = 77940502560.

The previous prime is 78197365633. The next prime is 78197365681. The reversal of 78197365679 is 97656379187.

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

It is a cyclic number.

It is not a de Polignac number, because 78197365679 - 2⁸ = 78197365423 is a prime.

It is a super-3 number, since 3×78197365679³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78197365619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3956129 + ... + 3975845.

It is an arithmetic number, because the mean of its divisors is an integer number (9806786736).

Almost surely, 2^78197365679 is an apocalyptic number.

78197365679 is a deficient number, since it is larger than the sum of its proper divisors (256928209).

78197365679 is a wasteful number, since it uses less digits than its factorization.

78197365679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32545.

The product of its digits is 120022560, while the sum is 68.

The spelling of 78197365679 in words is "seventy-eight billion, one hundred ninety-seven million, three hundred sixty-five thousand, six hundred seventy-nine".