64593691040 has 24 divisors (see below), whose sum is σ = 152602595460. Its totient is φ = 25837476352.

The previous prime is 64593691037. The next prime is 64593691067. The reversal of 64593691040 is 4019639546.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63059245456 + 1534445584 = 251116^2 + 39172^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 201855125 + ... + 201855444.

Almost surely, 2^64593691040 is an apocalyptic number.

It is an amenable number.

64593691040 is an abundant number, since it is smaller than the sum of its proper divisors (88008904420).

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

64593691040 is a wasteful number, since it uses less digits than its factorization.

64593691040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403710584 (or 403710576 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 64593691040 in words is "sixty-four billion, five hundred ninety-three million, six hundred ninety-one thousand, forty".