78964364679 has 4 divisors (see below), whose sum is σ = 105285819576. Its totient is φ = 52642909784.

The previous prime is 78964364657. The next prime is 78964364707. The reversal of 78964364679 is 97646346987.

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 78964364679 - 2¹⁹ = 78963840391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78964362679) 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, 13160727444 + ... + 13160727449.

It is an arithmetic number, because the mean of its divisors is an integer number (26321454894).

Almost surely, 2^78964364679 is an apocalyptic number.

78964364679 is a deficient number, since it is larger than the sum of its proper divisors (26321454897).

78964364679 is a wasteful number, since it uses less digits than its factorization.

78964364679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26321454896.

The product of its digits is 329204736, while the sum is 69.

The spelling of 78964364679 in words is "seventy-eight billion, nine hundred sixty-four million, three hundred sixty-four thousand, six hundred seventy-nine".