631387353540848 has 20 divisors (see below), whose sum is σ = 1235425007364648. Its totient is φ = 312567996801600.

The previous prime is 631387353540809. The next prime is 631387353540863. The reversal of 631387353540848 is 848045353783136.

It is a super-2 number, since 2×631387353540848² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195354996386 + ... + 195354999617.

Almost surely, 2^{631387353540848} is an apocalyptic number.

It is an amenable number.

631387353540848 is a deficient number, since it is larger than the sum of its proper divisors (604037653823800).

631387353540848 is a wasteful number, since it uses less digits than its factorization.

631387353540848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390709996112 (or 390709996106 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 68.

The spelling of 631387353540848 in words is "six hundred thirty-one trillion, three hundred eighty-seven billion, three hundred fifty-three million, five hundred forty thousand, eight hundred forty-eight".