478579357691 has 4 divisors (see below), whose sum is σ = 506731084632. Its totient is φ = 450427630752.

The previous prime is 478579357637. The next prime is 478579357721. The reversal of 478579357691 is 196753975874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478579357691 - 2²⁶ = 478512248827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478579347691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14075863445 + ... + 14075863478.

It is an arithmetic number, because the mean of its divisors is an integer number (126682771158).

Almost surely, 2^478579357691 is an apocalyptic number.

478579357691 is a deficient number, since it is larger than the sum of its proper divisors (28151726941).

478579357691 is a wasteful number, since it uses less digits than its factorization.

478579357691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28151726940.

The product of its digits is 400075200, while the sum is 71.

It can be divided in two parts, 4785793 and 57691, that added together give a palindrome (4843484).

The spelling of 478579357691 in words is "four hundred seventy-eight billion, five hundred seventy-nine million, three hundred fifty-seven thousand, six hundred ninety-one".