64443622634446 has 48 divisors (see below), whose sum is σ = 112279934405520. Its totient is φ = 27505792235520.

The previous prime is 64443622634431. The next prime is 64443622634459.

64443622634446 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8951181 + ... + 14457208.

It is an arithmetic number, because the mean of its divisors is an integer number (2339165300115).

Almost surely, 2^{64443622634446} is an apocalyptic number.

64443622634446 is a deficient number, since it is larger than the sum of its proper divisors (47836311771074).

64443622634446 is a wasteful number, since it uses less digits than its factorization.

64443622634446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408869 (or 23408852 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 58.

The spelling of 64443622634446 in words is "sixty-four trillion, four hundred forty-three billion, six hundred twenty-two million, six hundred thirty-four thousand, four hundred forty-six".