16939279449 has 24 divisors (see below), whose sum is σ = 24576683040. Its totient is φ = 11242738368.

The previous prime is 16939279387. The next prime is 16939279463. The reversal of 16939279449 is 94497293961.

16939279449 is a `hidden beast` number, since 16 + 93 + 92 + 7 + 9 + 449 = 666.

It is not a de Polignac number, because 16939279449 - 2⁷ = 16939279321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16939279249) 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, 1916362 + ... + 1925180.

It is an arithmetic number, because the mean of its divisors is an integer number (1024028460).

Almost surely, 2^16939279449 is an apocalyptic number.

It is an amenable number.

16939279449 is a deficient number, since it is larger than the sum of its proper divisors (7637403591).

16939279449 is a wasteful number, since it uses less digits than its factorization.

16939279449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9749 (or 9746 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The spelling of 16939279449 in words is "sixteen billion, nine hundred thirty-nine million, two hundred seventy-nine thousand, four hundred forty-nine".