631472342721 has 32 divisors (see below), whose sum is σ = 968495270400. Its totient is φ = 361949978880.

The previous prime is 631472342687. The next prime is 631472342779. The reversal of 631472342721 is 127243274136.

It is not a de Polignac number, because 631472342721 - 2¹³ = 631472334529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631472342791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489816 + ... + 1225913.

It is an arithmetic number, because the mean of its divisors is an integer number (30265477200).

Almost surely, 2^631472342721 is an apocalyptic number.

It is an amenable number.

631472342721 is a deficient number, since it is larger than the sum of its proper divisors (337022927679).

631472342721 is a wasteful number, since it uses less digits than its factorization.

631472342721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716349.

The product of its digits is 338688, while the sum is 42.

The spelling of 631472342721 in words is "six hundred thirty-one billion, four hundred seventy-two million, three hundred forty-two thousand, seven hundred twenty-one".