641644514 has 24 divisors (see below), whose sum is σ = 1122264108. Its totient is φ = 274337280.

The previous prime is 641644477. The next prime is 641644571. The reversal of 641644514 is 415446146.

It can be written as a sum of positive squares in 2 ways, for example, as 554838025 + 86806489 = 23555^2 + 9317^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34874 + ... + 49994.

Almost surely, 2^641644514 is an apocalyptic number.

641644514 is a deficient number, since it is larger than the sum of its proper divisors (480619594).

641644514 is a wasteful number, since it uses less digits than its factorization.

641644514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15570 (or 15563 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 641644514 is about 25330.7029906396. The cubic root of 641644514 is about 862.5113692823.

The spelling of 641644514 in words is "six hundred forty-one million, six hundred forty-four thousand, five hundred fourteen".