64499327072 has 24 divisors (see below), whose sum is σ = 130415026896. Its totient is φ = 31378050432.

The previous prime is 64499327063. The next prime is 64499327107. The reversal of 64499327072 is 27072399446.

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, 27236708 + ... + 27239075.

It is an arithmetic number, because the mean of its divisors is an integer number (5433959454).

Almost surely, 2^64499327072 is an apocalyptic number.

It is an amenable number.

64499327072 is an abundant number, since it is smaller than the sum of its proper divisors (65915699824).

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

64499327072 is a wasteful number, since it uses less digits than its factorization.

64499327072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54475830 (or 54475822 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 64499327072 in words is "sixty-four billion, four hundred ninety-nine million, three hundred twenty-seven thousand, seventy-two".