641364564 has 12 divisors (see below), whose sum is σ = 1496517344. Its totient is φ = 213788184.

The previous prime is 641364547. The next prime is 641364587. The reversal of 641364564 is 465463146.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641364564² = 822697007909820192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26723512 + ... + 26723535.

Almost surely, 2^641364564 is an apocalyptic number.

It is an amenable number.

641364564 is an abundant number, since it is smaller than the sum of its proper divisors (855152780).

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

641364564 is a wasteful number, since it uses less digits than its factorization.

641364564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53447054 (or 53447052 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 641364564 is about 25325.1764850711. The cubic root of 641364564 is about 862.3859129081.

The spelling of 641364564 in words is "six hundred forty-one million, three hundred sixty-four thousand, five hundred sixty-four".