631296861478 has 4 divisors (see below), whose sum is σ = 946945292220. Its totient is φ = 315648430738.

The previous prime is 631296861473. The next prime is 631296861479. The reversal of 631296861478 is 874168692136.

It is a happy number.

631296861478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631296861473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157824215368 + ... + 157824215371.

It is an arithmetic number, because the mean of its divisors is an integer number (236736323055).

Almost surely, 2^631296861478 is an apocalyptic number.

631296861478 is a deficient number, since it is larger than the sum of its proper divisors (315648430742).

631296861478 is a wasteful number, since it uses less digits than its factorization.

631296861478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315648430741.

The product of its digits is 20901888, while the sum is 61.

The spelling of 631296861478 in words is "six hundred thirty-one billion, two hundred ninety-six million, eight hundred sixty-one thousand, four hundred seventy-eight".