641787448 has 16 divisors (see below), whose sum is σ = 1211322960. Its totient is φ = 318768000.

The previous prime is 641787437. The next prime is 641787449. The reversal of 641787448 is 844787146.

It is a super-2 number, since 2×641787448² = 823782256820705408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641787449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264433 + ... + 266848.

It is an arithmetic number, because the mean of its divisors is an integer number (75707685).

Almost surely, 2^641787448 is an apocalyptic number.

It is an amenable number.

641787448 is a deficient number, since it is larger than the sum of its proper divisors (569535512).

641787448 is a wasteful number, since it uses less digits than its factorization.

641787448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531438 (or 531434 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 641787448 is about 25333.5241922635. The cubic root of 641787448 is about 862.5754094397.

The spelling of 641787448 in words is "six hundred forty-one million, seven hundred eighty-seven thousand, four hundred forty-eight".