64444602606464 has 16 divisors (see below), whose sum is σ = 128385731755320. Its totient is φ = 32222301303168.

The previous prime is 64444602606367. The next prime is 64444602606521. The reversal of 64444602606464 is 46460620644446.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251736728804 + ... + 251736729059.

Almost surely, 2^{64444602606464} is an apocalyptic number.

64444602606464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64444602606464 is a deficient number, since it is larger than the sum of its proper divisors (63941129148856).

64444602606464 is an equidigital number, since it uses as much as digits as its factorization.

64444602606464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503473457877 (or 503473457865 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 56.

The spelling of 64444602606464 in words is "sixty-four trillion, four hundred forty-four billion, six hundred two million, six hundred six thousand, four hundred sixty-four".