16849919169 has 24 divisors (see below), whose sum is σ = 25633258560. Its totient is φ = 10636447392.

The previous prime is 16849919153. The next prime is 16849919197. The reversal of 16849919169 is 96191994861.

It is not a de Polignac number, because 16849919169 - 2⁴ = 16849919153 is a prime.

It is a super-2 number, since 2×16849919169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16849919269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312412 + ... + 362354.

It is an arithmetic number, because the mean of its divisors is an integer number (1068052440).

Almost surely, 2^16849919169 is an apocalyptic number.

16849919169 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16849919169 is a deficient number, since it is larger than the sum of its proper divisors (8783339391).

16849919169 is a wasteful number, since it uses less digits than its factorization.

16849919169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51941 (or 51938 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The spelling of 16849919169 in words is "sixteen billion, eight hundred forty-nine million, nine hundred nineteen thousand, one hundred sixty-nine".