64993894548 has 48 divisors (see below), whose sum is σ = 174146327040. Its totient is φ = 18658533600.

The previous prime is 64993894519. The next prime is 64993894601. The reversal of 64993894548 is 84549839946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12954808 + ... + 12959823.

It is an arithmetic number, because the mean of its divisors is an integer number (3628048480).

Almost surely, 2^64993894548 is an apocalyptic number.

It is an amenable number.

64993894548 is an abundant number, since it is smaller than the sum of its proper divisors (109152432492).

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

64993894548 is a wasteful number, since it uses less digits than its factorization.

64993894548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25914668 (or 25914666 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 69.

The spelling of 64993894548 in words is "sixty-four billion, nine hundred ninety-three million, eight hundred ninety-four thousand, five hundred forty-eight".