631388142927 has 12 divisors (see below), whose sum is σ = 915821019360. Its totient is φ = 419164232928.

The previous prime is 631388142893. The next prime is 631388142943. The reversal of 631388142927 is 729241883136.

It is a happy number.

631388142927 is a `hidden beast` number, since 6 + 3 + 138 + 81 + 429 + 2 + 7 = 666.

631388142927 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631388142927 - 2⁷ = 631388142799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631388142127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146764038 + ... + 146768339.

It is an arithmetic number, because the mean of its divisors is an integer number (76318418280).

Almost surely, 2^631388142927 is an apocalyptic number.

631388142927 is a deficient number, since it is larger than the sum of its proper divisors (284432876433).

631388142927 is a wasteful number, since it uses less digits than its factorization.

631388142927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293532622 (or 293532619 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 631388142927 in words is "six hundred thirty-one billion, three hundred eighty-eight million, one hundred forty-two thousand, nine hundred twenty-seven".