64503169840 has 40 divisors (see below), whose sum is σ = 150045115248. Its totient is φ = 25788322560.

The previous prime is 64503169837. The next prime is 64503169849. The reversal of 64503169840 is 4896130546.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64503169849) 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, 41031 + ... + 361510.

Almost surely, 2^64503169840 is an apocalyptic number.

It is an amenable number.

64503169840 is an abundant number, since it is smaller than the sum of its proper divisors (85541945408).

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

64503169840 is a wasteful number, since it uses less digits than its factorization.

64503169840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404557 (or 404551 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 64503169840 in words is "sixty-four billion, five hundred three million, one hundred sixty-nine thousand, eight hundred forty".