16818031656 has 96 divisors (see below), whose sum is σ = 47195460000. Its totient is φ = 5406940032.

The previous prime is 16818031649. The next prime is 16818031663. The reversal of 16818031656 is 65613081861.

It is an interprime number because it is at equal distance from previous prime (16818031649) and next prime (16818031663).

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, 187795 + ... + 262493.

It is an arithmetic number, because the mean of its divisors is an integer number (491619375).

Almost surely, 2^16818031656 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 16818031656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23597730000).

16818031656 is an abundant number, since it is smaller than the sum of its proper divisors (30377428344).

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

16818031656 is a wasteful number, since it uses less digits than its factorization.

16818031656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74823 (or 74816 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 16818031656 in words is "sixteen billion, eight hundred eighteen million, thirty-one thousand, six hundred fifty-six".