641615264 has 48 divisors (see below), whose sum is σ = 1277248896. Its totient is φ = 317260800.

The previous prime is 641615201. The next prime is 641615267. The reversal of 641615264 is 462516146.

It is not an unprimeable number, because it can be changed into a prime (641615267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2089799 + ... + 2090105.

It is an arithmetic number, because the mean of its divisors is an integer number (26609352).

Almost surely, 2^641615264 is an apocalyptic number.

It is an amenable number.

641615264 is a deficient number, since it is larger than the sum of its proper divisors (635633632).

641615264 is a wasteful number, since it uses less digits than its factorization.

641615264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 821 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 641615264 is about 25330.1256214808. The cubic root of 641615264 is about 862.4982629385.

The spelling of 641615264 in words is "six hundred forty-one million, six hundred fifteen thousand, two hundred sixty-four".