641356205264 has 40 divisors (see below), whose sum is σ = 1288979880960. Its totient is φ = 308776503168.

The previous prime is 641356205261. The next prime is 641356205267. The reversal of 641356205264 is 462502653146.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (641356205261) and next prime (641356205267).

It is a super-2 number, since 2×641356205264² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641356205261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712864 + ... + 2053439.

It is an arithmetic number, because the mean of its divisors is an integer number (32224497024).

Almost surely, 2^641356205264 is an apocalyptic number.

It is an amenable number.

641356205264 is an abundant number, since it is smaller than the sum of its proper divisors (647623675696).

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

641356205264 is a wasteful number, since it uses less digits than its factorization.

641356205264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766707 (or 3766701 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 641356205264 in words is "six hundred forty-one billion, three hundred fifty-six million, two hundred five thousand, two hundred sixty-four".