64442002645 has 16 divisors (see below), whose sum is σ = 78499467648. Its totient is φ = 50774518080.

The previous prime is 64442002637. The next prime is 64442002661. The reversal of 64442002645 is 54620024446.

It is not a de Polignac number, because 64442002645 - 2³ = 64442002637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2127960 + ... + 2158030.

It is an arithmetic number, because the mean of its divisors is an integer number (4906216728).

Almost surely, 2^64442002645 is an apocalyptic number.

It is an amenable number.

64442002645 is a deficient number, since it is larger than the sum of its proper divisors (14057465003).

64442002645 is a wasteful number, since it uses less digits than its factorization.

64442002645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36540.

The product of its (nonzero) digits is 184320, while the sum is 37.

The spelling of 64442002645 in words is "sixty-four billion, four hundred forty-two million, two thousand, six hundred forty-five".