16808731400 has 24 divisors (see below), whose sum is σ = 39080300970. Its totient is φ = 6723492480.

The previous prime is 16808731397. The next prime is 16808731409. The reversal of 16808731400 is 413780861.

It can be written as a sum of positive squares in 3 ways, for example, as 9322674916 + 7486056484 = 96554^2 + 86522^2 .

It is not an unprimeable number, because it can be changed into a prime (16808731409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42021629 + ... + 42022028.

Almost surely, 2^16808731400 is an apocalyptic number.

16808731400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16808731400 is an abundant number, since it is smaller than the sum of its proper divisors (22271569570).

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

16808731400 is a wasteful number, since it uses less digits than its factorization.

16808731400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84043673 (or 84043664 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 16808731400 in words is "sixteen billion, eight hundred eight million, seven hundred thirty-one thousand, four hundred".