64851808896 has 576 divisors, whose sum is σ = 238464233280. Its totient is φ = 17432174592.

The previous prime is 64851808883. The next prime is 64851808927. The reversal of 64851808896 is 69880815846.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25908381 + ... + 25910883.

It is an arithmetic number, because the mean of its divisors is an integer number (414000405).

Almost surely, 2^64851808896 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 64851808896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119232116640).

64851808896 is an abundant number, since it is smaller than the sum of its proper divisors (173612424384).

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

64851808896 is a wasteful number, since it uses less digits than its factorization.

64851808896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The spelling of 64851808896 in words is "sixty-four billion, eight hundred fifty-one million, eight hundred eight thousand, eight hundred ninety-six".