641133630 has 112 divisors (see below), whose sum is σ = 1786713984. Its totient is φ = 165395520.

The previous prime is 641133613. The next prime is 641133643. The reversal of 641133630 is 36331146.

641133630 is a `hidden beast` number, since 641 + 13 + 3 + 6 + 3 + 0 = 666.

It is a super-2 number, since 2×641133630² = 822104663033953800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 641133594 and 641133603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 224572 + ... + 227408.

Almost surely, 2^641133630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641133630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893356992).

641133630 is an abundant number, since it is smaller than the sum of its proper divisors (1145580354).

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

641133630 is a wasteful number, since it uses less digits than its factorization.

641133630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 641133630 is about 25320.6166986509. The cubic root of 641133630 is about 862.2823950093.

Adding to 641133630 its reverse (36331146), we get a palindrome (677464776).

The spelling of 641133630 in words is "six hundred forty-one million, one hundred thirty-three thousand, six hundred thirty".