641870024 has 8 divisors (see below), whose sum is σ = 1203506310. Its totient is φ = 320935008.

The previous prime is 641869961. The next prime is 641870029. The reversal of 641870024 is 420078146.

It can be written as a sum of positive squares in only one way, i.e., 630913924 + 10956100 = 25118^2 + 3310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (641870029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40116869 + ... + 40116884.

Almost surely, 2^641870024 is an apocalyptic number.

It is an amenable number.

641870024 is a deficient number, since it is larger than the sum of its proper divisors (561636286).

641870024 is a wasteful number, since it uses less digits than its factorization.

641870024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80233759 (or 80233755 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 641870024 is about 25335.1539170379. The cubic root of 641870024 is about 862.6124024621.

The spelling of 641870024 in words is "six hundred forty-one million, eight hundred seventy thousand, twenty-four".