64861789086 has 96 divisors (see below), whose sum is σ = 150588940320. Its totient is φ = 20104962048.

The previous prime is 64861789079. The next prime is 64861789141. The reversal of 64861789086 is 68098716846.

64861789086 is a `hidden beast` number, since 6 + 4 + 8 + 617 + 8 + 9 + 0 + 8 + 6 = 666.

64861789086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 21933520 + ... + 21936476.

It is an arithmetic number, because the mean of its divisors is an integer number (1568634795).

Almost surely, 2^64861789086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64861789086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75294470160).

64861789086 is an abundant number, since it is smaller than the sum of its proper divisors (85727151234).

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

64861789086 is a wasteful number, since it uses less digits than its factorization.

64861789086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3815 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 64861789086 in words is "sixty-four billion, eight hundred sixty-one million, seven hundred eighty-nine thousand, eighty-six".