641504782808448 has 64 divisors (see below), whose sum is σ = 1835073777759600. Its totient is φ = 197386087016448.

The previous prime is 641504782808431. The next prime is 641504782808501. The reversal of 641504782808448 is 844808287405146.

641504782808448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×641504782808448² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

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, 64253278543 + ... + 64253288526.

Almost surely, 2^{641504782808448} is an apocalyptic number.

It is an amenable number.

641504782808448 is an abundant number, since it is smaller than the sum of its proper divisors (1193568994951152).

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

641504782808448 is a wasteful number, since it uses less digits than its factorization.

641504782808448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128506567099 (or 128506567087 counting only the distinct ones).

The product of its (nonzero) digits is 440401920, while the sum is 69.

The spelling of 641504782808448 in words is "six hundred forty-one trillion, five hundred four billion, seven hundred eighty-two million, eight hundred eight thousand, four hundred forty-eight".