64543023634 has 16 divisors (see below), whose sum is σ = 99196530048. Its totient is φ = 31481987472.

The previous prime is 64543023619. The next prime is 64543023661. The reversal of 64543023634 is 43632034546.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 1089429 + ... + 1147144.

It is an arithmetic number, because the mean of its divisors is an integer number (6199783128).

Almost surely, 2^64543023634 is an apocalyptic number.

64543023634 is a deficient number, since it is larger than the sum of its proper divisors (34653506414).

64543023634 is a wasteful number, since it uses less digits than its factorization.

64543023634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236929.

The product of its (nonzero) digits is 622080, while the sum is 40.

The spelling of 64543023634 in words is "sixty-four billion, five hundred forty-three million, twenty-three thousand, six hundred thirty-four".