78931966407 has 16 divisors (see below), whose sum is σ = 120282896640. Its totient is φ = 45101875392.

The previous prime is 78931966397. The next prime is 78931966441. The reversal of 78931966407 is 70466913987.

It is not a de Polignac number, because 78931966407 - 2⁴ = 78931966391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78931965407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449323 + ... + 599795.

It is an arithmetic number, because the mean of its divisors is an integer number (7517681040).

Almost surely, 2^78931966407 is an apocalyptic number.

78931966407 is a deficient number, since it is larger than the sum of its proper divisors (41350930233).

78931966407 is a wasteful number, since it uses less digits than its factorization.

78931966407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175462.

The product of its (nonzero) digits is 13716864, while the sum is 60.

The spelling of 78931966407 in words is "seventy-eight billion, nine hundred thirty-one million, nine hundred sixty-six thousand, four hundred seven".