14991790678 has 16 divisors (see below), whose sum is σ = 23470714080. Its totient is φ = 7168366656.

The previous prime is 14991790661. The next prime is 14991790687. The reversal of 14991790678 is 87609719941.

It is a congruent number.

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, 183076 + ... + 251992.

It is an arithmetic number, because the mean of its divisors is an integer number (1466919630).

Almost surely, 2^14991790678 is an apocalyptic number.

14991790678 is a deficient number, since it is larger than the sum of its proper divisors (8478923402).

14991790678 is a wasteful number, since it uses less digits than its factorization.

14991790678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73671.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 14991790678 in words is "fourteen billion, nine hundred ninety-one million, seven hundred ninety thousand, six hundred seventy-eight".