16455649 has 16 divisors (see below), whose sum is σ = 19768320. Its totient is φ = 13392720.

The previous prime is 16455623. The next prime is 16455661. The reversal of 16455649 is 94655461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16455649 - 2⁵ = 16455617 is a prime.

It is a super-2 number, since 2×16455649² = 541576768022402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16455619) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28534 + ... + 29104.

It is an arithmetic number, because the mean of its divisors is an integer number (1235520).

Almost surely, 2^16455649 is an apocalyptic number.

It is an amenable number.

16455649 is a deficient number, since it is larger than the sum of its proper divisors (3312671).

16455649 is a wasteful number, since it uses less digits than its factorization.

16455649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its digits is 129600, while the sum is 40.

The square root of 16455649 is about 4056.5562981426. The cubic root of 16455649 is about 254.3538633239.

The spelling of 16455649 in words is "sixteen million, four hundred fifty-five thousand, six hundred forty-nine".