83215509888 has 320 divisors, whose sum is σ = 263988648000. Its totient is φ = 23211869184.

The previous prime is 83215509877. The next prime is 83215509911. The reversal of 83215509888 is 88890551238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39644263 + ... + 39646361.

It is an arithmetic number, because the mean of its divisors is an integer number (824964525).

Almost surely, 2^83215509888 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 83215509888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131994324000).

83215509888 is an abundant number, since it is smaller than the sum of its proper divisors (180773138112).

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

83215509888 is an equidigital number, since it uses as much as digits as its factorization.

83215509888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 57.

The spelling of 83215509888 in words is "eighty-three billion, two hundred fifteen million, five hundred nine thousand, eight hundred eighty-eight".