64386498816 has 432 divisors, whose sum is σ = 199506827520. Its totient is φ = 19926466560.

The previous prime is 64386498811. The next prime is 64386498833. The reversal of 64386498816 is 61889468346.

64386498816 is a `hidden beast` number, since 64 + 3 + 8 + 6 + 498 + 81 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64386498811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410105010 + ... + 410105166.

It is an arithmetic number, because the mean of its divisors is an integer number (461821360).

Almost surely, 2^64386498816 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 64386498816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99753413760).

64386498816 is an abundant number, since it is smaller than the sum of its proper divisors (135120328704).

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

64386498816 is a wasteful number, since it uses less digits than its factorization.

64386498816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 365 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 63.

The spelling of 64386498816 in words is "sixty-four billion, three hundred eighty-six million, four hundred ninety-eight thousand, eight hundred sixteen".