86981423256 has 192 divisors, whose sum is σ = 290178208320. Its totient is φ = 22921159680.

The previous prime is 86981423239. The next prime is 86981423303. The reversal of 86981423256 is 65232418968.

86981423256 is a `hidden beast` number, since 86 + 98 + 1 + 423 + 2 + 56 = 666.

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, 9043506 + ... + 9053118.

It is an arithmetic number, because the mean of its divisors is an integer number (1511344835).

Almost surely, 2^86981423256 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 86981423256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145089104160).

86981423256 is an abundant number, since it is smaller than the sum of its proper divisors (203196785064).

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

86981423256 is a wasteful number, since it uses less digits than its factorization.

86981423256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026 (or 11019 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 86981423256 in words is "eighty-six billion, nine hundred eighty-one million, four hundred twenty-three thousand, two hundred fifty-six".