631525994541 has 48 divisors (see below), whose sum is σ = 1035936195840. Its totient is φ = 367515377280.

The previous prime is 631525994531. The next prime is 631525994543. The reversal of 631525994541 is 145499525136.

It is a happy number.

631525994541 is a `hidden beast` number, since 6 + 3 + 1 + 5 + 2 + 5 + 9 + 94 + 541 = 666.

It is not a de Polignac number, because 631525994541 - 2²⁵ = 631492440109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631525994543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 983196 + ... + 1493226.

It is an arithmetic number, because the mean of its divisors is an integer number (21582004080).

Almost surely, 2^631525994541 is an apocalyptic number.

It is an amenable number.

631525994541 is a deficient number, since it is larger than the sum of its proper divisors (404410201299).

631525994541 is a wasteful number, since it uses less digits than its factorization.

631525994541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510626 (or 510623 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 631525994541 in words is "six hundred thirty-one billion, five hundred twenty-five million, nine hundred ninety-four thousand, five hundred forty-one".