78699372479 has 16 divisors (see below), whose sum is σ = 99478628928. Its totient is φ = 60584723712.

The previous prime is 78699372463. The next prime is 78699372491. The reversal of 78699372479 is 97427399687.

It is a cyclic number.

It is not a de Polignac number, because 78699372479 - 2⁴ = 78699372463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78699372779) 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, 11683502 + ... + 11690235.

It is an arithmetic number, because the mean of its divisors is an integer number (6217414308).

Almost surely, 2^78699372479 is an apocalyptic number.

78699372479 is a deficient number, since it is larger than the sum of its proper divisors (20779256449).

78699372479 is a wasteful number, since it uses less digits than its factorization.

78699372479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23373794.

The product of its digits is 288054144, while the sum is 71.

The spelling of 78699372479 in words is "seventy-eight billion, six hundred ninety-nine million, three hundred seventy-two thousand, four hundred seventy-nine".