16426649 has 4 divisors (see below), whose sum is σ = 16480464. Its totient is φ = 16372836.

The previous prime is 16426643. The next prime is 16426681. The reversal of 16426649 is 94662461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94662461 = 79 ⋅1198259.

It is a cyclic number.

It is not a de Polignac number, because 16426649 - 2²⁰ = 15378073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16426643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26447 + ... + 27060.

It is an arithmetic number, because the mean of its divisors is an integer number (4120116).

Almost surely, 2^16426649 is an apocalyptic number.

It is an amenable number.

16426649 is a deficient number, since it is larger than the sum of its proper divisors (53815).

16426649 is an equidigital number, since it uses as much as digits as its factorization.

16426649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53814.

The product of its digits is 62208, while the sum is 38.

The square root of 16426649 is about 4052.9802614866. The cubic root of 16426649 is about 254.2043584462.

The spelling of 16426649 in words is "sixteen million, four hundred twenty-six thousand, six hundred forty-nine".