64544416064 has 28 divisors (see below), whose sum is σ = 128928559008. Its totient is φ = 32058480000.

The previous prime is 64544416043. The next prime is 64544416081. The reversal of 64544416064 is 46061444546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3329762 + ... + 3349089.

Almost surely, 2^64544416064 is an apocalyptic number.

64544416064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64544416064 is a deficient number, since it is larger than the sum of its proper divisors (64384142944).

64544416064 is a wasteful number, since it uses less digits than its factorization.

64544416064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679014 (or 6679004 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 64544416064 in words is "sixty-four billion, five hundred forty-four million, four hundred sixteen thousand, sixty-four".