16199800638 has 32 divisors (see below), whose sum is σ = 37409858304. Its totient is φ = 4580796672.

The previous prime is 16199800637. The next prime is 16199800651. The reversal of 16199800638 is 83600899161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16199800637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1984120 + ... + 1992267.

It is an arithmetic number, because the mean of its divisors is an integer number (1169058072).

Almost surely, 2^16199800638 is an apocalyptic number.

16199800638 is an abundant number, since it is smaller than the sum of its proper divisors (21210057666).

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

16199800638 is a wasteful number, since it uses less digits than its factorization.

16199800638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976496.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 16199800638 in words is "sixteen billion, one hundred ninety-nine million, eight hundred thousand, six hundred thirty-eight".