631749871200 has 144 divisors (see below), whose sum is σ = 2350109583360. Its totient is φ = 144399966720.

The previous prime is 631749871157. The next prime is 631749871213. The reversal of 631749871200 is 2178947136.

It is a happy number.

It is a super-2 number, since 2×631749871200² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 631749871200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18785280 + ... + 18818879.

It is an arithmetic number, because the mean of its divisors is an integer number (16320205440).

Almost surely, 2^631749871200 is an apocalyptic number.

631749871200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631749871200 is an abundant number, since it is smaller than the sum of its proper divisors (1718359712160).

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

631749871200 is a wasteful number, since it uses less digits than its factorization.

631749871200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37604189 (or 37604176 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 631749871200 in words is "six hundred thirty-one billion, seven hundred forty-nine million, eight hundred seventy-one thousand, two hundred".