86747781168 has 80 divisors (see below), whose sum is σ = 249573852640. Its totient is φ = 28849084416.

The previous prime is 86747781163. The next prime is 86747781179. The reversal of 86747781168 is 86118774768.

86747781168 is a `hidden beast` number, since 86 + 7 + 477 + 81 + 1 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (86747781161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44821 + ... + 418932.

It is an arithmetic number, because the mean of its divisors is an integer number (3119673158).

Almost surely, 2^86747781168 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 86747781168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124786926320).

86747781168 is an abundant number, since it is smaller than the sum of its proper divisors (162826071472).

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

86747781168 is a wasteful number, since it uses less digits than its factorization.

86747781168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464203 (or 464191 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 63.

Subtracting from 86747781168 its reverse (86118774768), we obtain a square (629006400 = 25080²).

The spelling of 86747781168 in words is "eighty-six billion, seven hundred forty-seven million, seven hundred eighty-one thousand, one hundred sixty-eight".