78888398659 has 16 divisors (see below), whose sum is σ = 90549204480. Its totient is φ = 67325544000.

The previous prime is 78888398647. The next prime is 78888398723. The reversal of 78888398659 is 95689388887.

It is a cyclic number.

It is not a de Polignac number, because 78888398659 - 2⁵ = 78888398627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78888398609) 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, 6528247 + ... + 6540319.

It is an arithmetic number, because the mean of its divisors is an integer number (5659325280).

Almost surely, 2^78888398659 is an apocalyptic number.

78888398659 is a deficient number, since it is larger than the sum of its proper divisors (11660805821).

78888398659 is a wasteful number, since it uses less digits than its factorization.

78888398659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16050.

The product of its digits is 1672151040, while the sum is 79.

The spelling of 78888398659 in words is "seventy-eight billion, eight hundred eighty-eight million, three hundred ninety-eight thousand, six hundred fifty-nine".