16031844864 has 160 divisors (see below), whose sum is σ = 54235040640. Its totient is φ = 4580499456.

The previous prime is 16031844853. The next prime is 16031844893. The reversal of 16031844864 is 46844813061.

16031844864 is a `hidden beast` number, since 1 + 60 + 31 + 84 + 486 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13932 + ... + 179604.

It is an arithmetic number, because the mean of its divisors is an integer number (338969004).

Almost surely, 2^16031844864 is an apocalyptic number.

16031844864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16031844864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27117520320).

16031844864 is an abundant number, since it is smaller than the sum of its proper divisors (38203195776).

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

16031844864 is an equidigital number, since it uses as much as digits as its factorization.

16031844864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165707 (or 165685 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 16031844864 in words is "sixteen billion, thirty-one million, eight hundred forty-four thousand, eight hundred sixty-four".