864653908608 has 384 divisors, whose sum is σ = 3107987850240. Its totient is φ = 225010483200.

The previous prime is 864653908597. The next prime is 864653908711. The reversal of 864653908608 is 806809356468.

864653908608 is a `hidden beast` number, since 8 + 6 + 465 + 3 + 90 + 86 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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 47 ways as a sum of consecutive naturals, for example, 4147998 + ... + 4351458.

It is an arithmetic number, because the mean of its divisors is an integer number (8093718360).

Almost surely, 2^864653908608 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 864653908608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553993925120).

864653908608 is an abundant number, since it is smaller than the sum of its proper divisors (2243333941632).

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

864653908608 is a wasteful number, since it uses less digits than its factorization.

864653908608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203536 (or 203521 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 864653908608 in words is "eight hundred sixty-four billion, six hundred fifty-three million, nine hundred eight thousand, six hundred eight".