631648140 has 24 divisors (see below), whose sum is σ = 1768614960. Its totient is φ = 168439488.

The previous prime is 631648139. The next prime is 631648151. The reversal of 631648140 is 41846136.

631648140 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 7 ways as a sum of consecutive naturals, for example, 5263675 + ... + 5263794.

It is an arithmetic number, because the mean of its divisors is an integer number (73692290).

Almost surely, 2^631648140 is an apocalyptic number.

631648140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631648140 is an abundant number, since it is smaller than the sum of its proper divisors (1136966820).

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

631648140 is a wasteful number, since it uses less digits than its factorization.

631648140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10527481 (or 10527479 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 631648140 is about 25132.6110859974. The cubic root of 631648140 is about 858.0087968627.

The spelling of 631648140 in words is "six hundred thirty-one million, six hundred forty-eight thousand, one hundred forty".