631712562387 has 4 divisors (see below), whose sum is σ = 842283416520. Its totient is φ = 421141708256.

The previous prime is 631712562359. The next prime is 631712562421. The reversal of 631712562387 is 783265217136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631712562387 - 2³¹ = 629565078739 is a prime.

It is a super-2 number, since 2×631712562387² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631712562307) 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, 105285427062 + ... + 105285427067.

It is an arithmetic number, because the mean of its divisors is an integer number (210570854130).

Almost surely, 2^631712562387 is an apocalyptic number.

631712562387 is a deficient number, since it is larger than the sum of its proper divisors (210570854133).

631712562387 is a wasteful number, since it uses less digits than its factorization.

631712562387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210570854132.

The product of its digits is 2540160, while the sum is 51.

The spelling of 631712562387 in words is "six hundred thirty-one billion, seven hundred twelve million, five hundred sixty-two thousand, three hundred eighty-seven".