631295486640 has 600 divisors, whose sum is σ = 2746769976720. Its totient is φ = 133195539456.

The previous prime is 631295486587. The next prime is 631295486651. The reversal of 631295486640 is 46684592136.

631295486640 is a `hidden beast` number, since 6 + 3 + 12 + 95 + 486 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4051291 + ... + 4204229.

Almost surely, 2^631295486640 is an apocalyptic number.

631295486640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631295486640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373384988360).

631295486640 is an abundant number, since it is smaller than the sum of its proper divisors (2115474490080).

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

631295486640 is a wasteful number, since it uses less digits than its factorization.

631295486640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152991 (or 152969 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 631295486640 in words is "six hundred thirty-one billion, two hundred ninety-five million, four hundred eighty-six thousand, six hundred forty".