16315891900 has 144 divisors (see below), whose sum is σ = 44374659840. Its totient is φ = 5058662400.

The previous prime is 16315891849. The next prime is 16315891909. The reversal of 16315891900 is 919851361.

It is a super-2 number, since 2×16315891900² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16315891909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1480611 + ... + 1491589.

It is an arithmetic number, because the mean of its divisors is an integer number (308157360).

Almost surely, 2^16315891900 is an apocalyptic number.

16315891900 is a gapful number since it is divisible by the number (10) 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 16315891900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22187329920).

16315891900 is an abundant number, since it is smaller than the sum of its proper divisors (28058767940).

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

16315891900 is a wasteful number, since it uses less digits than its factorization.

16315891900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11204 (or 11197 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The spelling of 16315891900 in words is "sixteen billion, three hundred fifteen million, eight hundred ninety-one thousand, nine hundred".