64442870591 has 8 divisors (see below), whose sum is σ = 70502754000. Its totient is φ = 58416560640.

The previous prime is 64442870539. The next prime is 64442870599. The reversal of 64442870591 is 19507824446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64442870591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64442870599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8389346 + ... + 8397023.

It is an arithmetic number, because the mean of its divisors is an integer number (8812844250).

Almost surely, 2^64442870591 is an apocalyptic number.

64442870591 is a deficient number, since it is larger than the sum of its proper divisors (6059883409).

64442870591 is a wasteful number, since it uses less digits than its factorization.

64442870591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16786729.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 64442870591 in words is "sixty-four billion, four hundred forty-two million, eight hundred seventy thousand, five hundred ninety-one".