78697535858 has 16 divisors (see below), whose sum is σ = 119791742400. Its totient is φ = 38767722000.

The previous prime is 78697535843. The next prime is 78697535867. The reversal of 78697535858 is 85853579687.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a junction number, because it is equal to n+sod(n) for n = 78697535791 and 78697535800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15068 + ... + 397016.

It is an arithmetic number, because the mean of its divisors is an integer number (7486983900).

Almost surely, 2^78697535858 is an apocalyptic number.

78697535858 is a deficient number, since it is larger than the sum of its proper divisors (41094206542).

78697535858 is a wasteful number, since it uses less digits than its factorization.

78697535858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383473.

The product of its digits is 508032000, while the sum is 71.

The spelling of 78697535858 in words is "seventy-eight billion, six hundred ninety-seven million, five hundred thirty-five thousand, eight hundred fifty-eight".