631454973193 has 4 divisors (see below), whose sum is σ = 688859970768. Its totient is φ = 574049975620.

The previous prime is 631454973139. The next prime is 631454973221. The reversal of 631454973193 is 391379454136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-631454973193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631454973113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28702498771 + ... + 28702498792.

It is an arithmetic number, because the mean of its divisors is an integer number (172214992692).

Almost surely, 2^631454973193 is an apocalyptic number.

It is an amenable number.

631454973193 is a deficient number, since it is larger than the sum of its proper divisors (57404997575).

631454973193 is a wasteful number, since it uses less digits than its factorization.

631454973193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57404997574.

The product of its digits is 7348320, while the sum is 55.

The spelling of 631454973193 in words is "six hundred thirty-one billion, four hundred fifty-four million, nine hundred seventy-three thousand, one hundred ninety-three".