78566378835 has 32 divisors (see below), whose sum is σ = 144123287040. Its totient is φ = 35801296128.

The previous prime is 78566378809. The next prime is 78566378843. The reversal of 78566378835 is 53887366587.

It is not a de Polignac number, because 78566378835 - 2¹¹ = 78566376787 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1162425 + ... + 1228154.

It is an arithmetic number, because the mean of its divisors is an integer number (4503852720).

Almost surely, 2^78566378835 is an apocalyptic number.

78566378835 is a deficient number, since it is larger than the sum of its proper divisors (65556908205).

78566378835 is a wasteful number, since it uses less digits than its factorization.

78566378835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390907.

The product of its digits is 203212800, while the sum is 66.

The spelling of 78566378835 in words is "seventy-eight billion, five hundred sixty-six million, three hundred seventy-eight thousand, eight hundred thirty-five".