631641590 has 16 divisors (see below), whose sum is σ = 1141186320. Its totient is φ = 251716320.

The previous prime is 631641589. The next prime is 631641599. The reversal of 631641590 is 95146136.

It is a self number, because there is not a number n which added to its sum of digits gives 631641590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631641599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114716 + ... + 120095.

It is an arithmetic number, because the mean of its divisors is an integer number (71324145).

Almost surely, 2^631641590 is an apocalyptic number.

631641590 is a deficient number, since it is larger than the sum of its proper divisors (509544730).

631641590 is a wasteful number, since it uses less digits than its factorization.

631641590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235087.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 631641590 is about 25132.4807768752. The cubic root of 631641590 is about 858.0058310886.

The spelling of 631641590 in words is "six hundred thirty-one million, six hundred forty-one thousand, five hundred ninety".