64454945568 has 192 divisors, whose sum is σ = 183956355072. Its totient is φ = 19643166720.

The previous prime is 64454945549. The next prime is 64454945603. The reversal of 64454945568 is 86554945446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75562230 + ... + 75563082.

It is an arithmetic number, because the mean of its divisors is an integer number (958106016).

Almost surely, 2^64454945568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64454945568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91978177536).

64454945568 is an abundant number, since it is smaller than the sum of its proper divisors (119501409504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64454945568 is a wasteful number, since it uses less digits than its factorization.

64454945568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1379 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 60.

The spelling of 64454945568 in words is "sixty-four billion, four hundred fifty-four million, nine hundred forty-five thousand, five hundred sixty-eight".