16504649 has 4 divisors (see below), whose sum is σ = 18862464. Its totient is φ = 14146836.

The previous prime is 16504613. The next prime is 16504669. The reversal of 16504649 is 94640561.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16504649 is a prime.

It is a super-2 number, since 2×16504649² = 544806877226402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16504669) 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, 1178897 + ... + 1178910.

It is an arithmetic number, because the mean of its divisors is an integer number (4715616).

Almost surely, 2^16504649 is an apocalyptic number.

It is an amenable number.

16504649 is a deficient number, since it is larger than the sum of its proper divisors (2357815).

16504649 is an equidigital number, since it uses as much as digits as its factorization.

16504649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357814.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 16504649 is about 4062.5914143561. The cubic root of 16504649 is about 254.6060763892.

The spelling of 16504649 in words is "sixteen million, five hundred four thousand, six hundred forty-nine".