64855948752 has 160 divisors (see below), whose sum is σ = 213437807360. Its totient is φ = 18470799360.

The previous prime is 64855948739. The next prime is 64855948789. The reversal of 64855948752 is 25784955846.

64855948752 is a `hidden beast` number, since 6 + 4 + 8 + 559 + 4 + 8 + 75 + 2 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64855948752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 912252 + ... + 980772.

It is an arithmetic number, because the mean of its divisors is an integer number (1333986296).

Almost surely, 2^64855948752 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 64855948752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106718903680).

64855948752 is an abundant number, since it is smaller than the sum of its proper divisors (148581858608).

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

64855948752 is a wasteful number, since it uses less digits than its factorization.

64855948752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68858 (or 68846 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 64855948752 in words is "sixty-four billion, eight hundred fifty-five million, nine hundred forty-eight thousand, seven hundred fifty-two".