631541257902 has 96 divisors (see below), whose sum is σ = 1469020999680. Its totient is φ = 195707378880.

The previous prime is 631541257877. The next prime is 631541257909. The reversal of 631541257902 is 209752145136.

631541257902 is a `hidden beast` number, since 6 + 31 + 5 + 41 + 2 + 579 + 0 + 2 = 666.

631541257902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631541257909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1437433 + ... + 1824635.

It is an arithmetic number, because the mean of its divisors is an integer number (15302302080).

Almost surely, 2^631541257902 is an apocalyptic number.

631541257902 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 631541257902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734510499840).

631541257902 is an abundant number, since it is smaller than the sum of its proper divisors (837479741778).

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

631541257902 is a wasteful number, since it uses less digits than its factorization.

631541257902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387358 (or 387355 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 631541257902 in words is "six hundred thirty-one billion, five hundred forty-one million, two hundred fifty-seven thousand, nine hundred two".