641653572 has 24 divisors (see below), whose sum is σ = 1711076416. Its totient is φ = 183329568.

The previous prime is 641653553. The next prime is 641653619. The reversal of 641653572 is 275356146.

It is a self number, because there is not a number n which added to its sum of digits gives 641653572.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3819283 + ... + 3819450.

Almost surely, 2^641653572 is an apocalyptic number.

It is an amenable number.

641653572 is an abundant number, since it is smaller than the sum of its proper divisors (1069422844).

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

641653572 is a wasteful number, since it uses less digits than its factorization.

641653572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7638747 (or 7638745 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

The square root of 641653572 is about 25330.8817848886. The cubic root of 641653572 is about 862.5154279114.

The spelling of 641653572 in words is "six hundred forty-one million, six hundred fifty-three thousand, five hundred seventy-two".