16199618909844 has 12 divisors (see below), whose sum is σ = 37799110789664. Its totient is φ = 5399872969944.

The previous prime is 16199618909819. The next prime is 16199618909857. The reversal of 16199618909844 is 44890981699161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674984121232 + ... + 674984121255.

Almost surely, 2^{16199618909844} is an apocalyptic number.

It is an amenable number.

16199618909844 is an abundant number, since it is smaller than the sum of its proper divisors (21599491879820).

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

16199618909844 is a wasteful number, since it uses less digits than its factorization.

16199618909844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349968242494 (or 1349968242492 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 75.

The spelling of 16199618909844 in words is "sixteen trillion, one hundred ninety-nine billion, six hundred eighteen million, nine hundred nine thousand, eight hundred forty-four".