199002263688 has 108 divisors (see below), whose sum is σ = 569029639815. Its totient is φ = 62820108576.

The previous prime is 199002263633. The next prime is 199002263701. The reversal of 199002263688 is 886362200991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 99501131844 + 99501131844 = 315438^2 + 315438^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=315438.

It is a super-2 number, since 2×199002263688² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 71918481 + ... + 71921247.

Almost surely, 2^199002263688 is an apocalyptic number.

199002263688 is a gapful number since it is divisible by the number (18) 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 199002263688

199002263688 is an abundant number, since it is smaller than the sum of its proper divisors (370027376127).

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

199002263688 is an equidigital number, since it uses as much as digits as its factorization.

199002263688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 199002263688 in words is "one hundred ninety-nine billion, two million, two hundred sixty-three thousand, six hundred eighty-eight".