16787133449 has 8 divisors (see below), whose sum is σ = 17076291720. Its totient is φ = 16498425600.

The previous prime is 16787133437. The next prime is 16787133457. The reversal of 16787133449 is 94433178761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5075565049 + 11711568400 = 71243^2 + 108220^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16787133449 - 2²⁴ = 16770356233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16787133449.

It is not an unprimeable number, because it can be changed into a prime (16787133499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36992 + ... + 186929.

It is an arithmetic number, because the mean of its divisors is an integer number (2134536465).

Almost surely, 2^16787133449 is an apocalyptic number.

It is an amenable number.

16787133449 is a deficient number, since it is larger than the sum of its proper divisors (289158271).

16787133449 is a wasteful number, since it uses less digits than its factorization.

16787133449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225211.

The product of its digits is 3048192, while the sum is 53.

The spelling of 16787133449 in words is "sixteen billion, seven hundred eighty-seven million, one hundred thirty-three thousand, four hundred forty-nine".