631938125645 has 16 divisors (see below), whose sum is σ = 774521153280. Its totient is φ = 494755255104.

The previous prime is 631938125629. The next prime is 631938125723. The reversal of 631938125645 is 546521839136.

It is a cyclic number.

It is not a de Polignac number, because 631938125645 - 2⁴ = 631938125629 is a prime.

It is a super-3 number, since 3×631938125645³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100286 + ... + 3297824.

It is an arithmetic number, because the mean of its divisors is an integer number (48407572080).

Almost surely, 2^631938125645 is an apocalyptic number.

It is an amenable number.

631938125645 is a deficient number, since it is larger than the sum of its proper divisors (142583027635).

631938125645 is a wasteful number, since it uses less digits than its factorization.

631938125645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211204.

The product of its digits is 4665600, while the sum is 53.

The spelling of 631938125645 in words is "six hundred thirty-one billion, nine hundred thirty-eight million, one hundred twenty-five thousand, six hundred forty-five".