641376624 has 80 divisors (see below), whose sum is σ = 1896521472. Its totient is φ = 182966784.

The previous prime is 641376581. The next prime is 641376649. The reversal of 641376624 is 426673146.

It is a happy number.

It is a super-2 number, since 2×641376624² = 822727947627274752, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319207 + ... + 321209.

Almost surely, 2^641376624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641376624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948260736).

641376624 is an abundant number, since it is smaller than the sum of its proper divisors (1255144848).

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

641376624 is a wasteful number, since it uses less digits than its factorization.

641376624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974 (or 2968 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 641376624 is about 25325.4145869322. The cubic root of 641376624 is about 862.3913182109.

The spelling of 641376624 in words is "six hundred forty-one million, three hundred seventy-six thousand, six hundred twenty-four".