86821996128 has 144 divisors (see below), whose sum is σ = 265698894384. Its totient is φ = 24751856640.

The previous prime is 86821996087. The next prime is 86821996139. The reversal of 86821996128 is 82169912868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2148526 + ... + 2188562.

It is an arithmetic number, because the mean of its divisors is an integer number (1845131211).

Almost surely, 2^86821996128 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 86821996128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132849447192).

86821996128 is an abundant number, since it is smaller than the sum of its proper divisors (178876898256).

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

86821996128 is a wasteful number, since it uses less digits than its factorization.

86821996128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40525 (or 40510 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 60.

The spelling of 86821996128 in words is "eighty-six billion, eight hundred twenty-one million, nine hundred ninety-six thousand, one hundred twenty-eight".