631740749640 has 384 divisors, whose sum is σ = 2590077409920. Its totient is φ = 121172889600.

The previous prime is 631740749593. The next prime is 631740749677. The reversal of 631740749640 is 46947047136.

631740749640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 465180 + ... + 1216500.

It is an arithmetic number, because the mean of its divisors is an integer number (6744993255).

Almost surely, 2^631740749640 is an apocalyptic number.

631740749640 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 631740749640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295038704960).

631740749640 is an abundant number, since it is smaller than the sum of its proper divisors (1958336660280).

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

631740749640 is a wasteful number, since it uses less digits than its factorization.

631740749640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751373 (or 751362 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 631740749640 in words is "six hundred thirty-one billion, seven hundred forty million, seven hundred forty-nine thousand, six hundred forty".