631348397893608 has 256 divisors, whose sum is σ = 1696312938240000. Its totient is φ = 195229704176640.

The previous prime is 631348397893607. The next prime is 631348397893667. The reversal of 631348397893608 is 806398793843136.

It is not an unprimeable number, because it can be changed into a prime (631348397893601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4804241310 + ... + 4804372722.

It is an arithmetic number, because the mean of its divisors is an integer number (6626222415000).

Almost surely, 2^{631348397893608} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631348397893608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848156469120000).

631348397893608 is an abundant number, since it is smaller than the sum of its proper divisors (1064964540346392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631348397893608 is a wasteful number, since it uses less digits than its factorization.

631348397893608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132520 (or 132516 counting only the distinct ones).

The product of its (nonzero) digits is 3386105856, while the sum is 78.

The spelling of 631348397893608 in words is "six hundred thirty-one trillion, three hundred forty-eight billion, three hundred ninety-seven million, eight hundred ninety-three thousand, six hundred eight".