641623792 has 20 divisors (see below), whose sum is σ = 1316272896. Its totient is φ = 301940480.

The previous prime is 641623757. The next prime is 641623793. The reversal of 641623792 is 297326146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641623793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179184 + ... + 1179727.

Almost surely, 2^641623792 is an apocalyptic number.

It is an amenable number.

641623792 is an abundant number, since it is smaller than the sum of its proper divisors (674649104).

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

641623792 is a wasteful number, since it uses less digits than its factorization.

641623792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358936 (or 2358930 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 641623792 is about 25330.2939580258. The cubic root of 641623792 is about 862.5020842070.

The spelling of 641623792 in words is "six hundred forty-one million, six hundred twenty-three thousand, seven hundred ninety-two".