631255680 has 512 divisors, whose sum is σ = 2529273600. Its totient is φ = 149299200.

The previous prime is 631255657. The next prime is 631255699. The reversal of 631255680 is 86552136.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15396460 + ... + 15396500.

Almost surely, 2^631255680 is an apocalyptic number.

631255680 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 631255680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264636800).

631255680 is an abundant number, since it is smaller than the sum of its proper divisors (1898017920).

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

631255680 is an equidigital number, since it uses as much as digits as its factorization.

631255680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 631255680 is about 25124.8020887728. The cubic root of 631255680 is about 857.8310587224.

The spelling of 631255680 in words is "six hundred thirty-one million, two hundred fifty-five thousand, six hundred eighty".