641477528 has 16 divisors (see below), whose sum is σ = 1204741680. Its totient is φ = 320213088.

The previous prime is 641477527. The next prime is 641477533. The reversal of 641477528 is 825774146.

It is a super-2 number, since 2×641477528² = 822986837857981568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641477527) 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, 60500 + ... + 70307.

It is an arithmetic number, because the mean of its divisors is an integer number (75296355).

Almost surely, 2^641477528 is an apocalyptic number.

It is an amenable number.

641477528 is a deficient number, since it is larger than the sum of its proper divisors (563264152).

641477528 is a wasteful number, since it uses less digits than its factorization.

641477528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131426 (or 131422 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 641477528 is about 25327.4066576110. The cubic root of 641477528 is about 862.4365408187.

The spelling of 641477528 in words is "six hundred forty-one million, four hundred seventy-seven thousand, five hundred twenty-eight".