16456749 has 12 divisors (see below), whose sum is σ = 22557024. Its totient is φ = 10671984.

The previous prime is 16456747. The next prime is 16456757. The reversal of 16456749 is 94765461.

It is not a de Polignac number, because 16456749 - 2¹ = 16456747 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16456749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16456747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2104 + ... + 6110.

It is an arithmetic number, because the mean of its divisors is an integer number (1879752).

Almost surely, 2^16456749 is an apocalyptic number.

It is an amenable number.

16456749 is a deficient number, since it is larger than the sum of its proper divisors (6100275).

16456749 is an equidigital number, since it uses as much as digits as its factorization.

16456749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084 (or 4047 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 16456749 is about 4056.6918788589. The cubic root of 16456749 is about 254.3595307397.

It can be divided in two parts, 16456 and 749, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 16456749 in words is "sixteen million, four hundred fifty-six thousand, seven hundred forty-nine".