64864862208 has 300 divisors, whose sum is σ = 199176044452. Its totient is φ = 21021327360.

The previous prime is 64864862141. The next prime is 64864862213. The reversal of 64864862208 is 80226846846.

64864862208 is a `hidden beast` number, since 6 + 4 + 8 + 6 + 4 + 8 + 622 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59083997184 + 5780865024 = 243072^2 + 76032^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49102188 + ... + 49103508.

Almost surely, 2^64864862208 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 64864862208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99588022226).

64864862208 is an abundant number, since it is smaller than the sum of its proper divisors (134311182244).

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

64864862208 is an equidigital number, since it uses as much as digits as its factorization.

64864862208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The spelling of 64864862208 in words is "sixty-four billion, eight hundred sixty-four million, eight hundred sixty-two thousand, two hundred eight".