16406645 has 8 divisors (see below), whose sum is σ = 19716480. Its totient is φ = 13106320.

The previous prime is 16406639. The next prime is 16406653. The reversal of 16406645 is 54660461.

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

It is not a de Polignac number, because 16406645 - 2⁴ = 16406629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 6150.

It is an arithmetic number, because the mean of its divisors is an integer number (2464560).

Almost surely, 2^16406645 is an apocalyptic number.

It is an amenable number.

16406645 is a deficient number, since it is larger than the sum of its proper divisors (3309835).

16406645 is an equidigital number, since it uses as much as digits as its factorization.

16406645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 16406645 is about 4050.5116960700. The cubic root of 16406645 is about 254.1011284334.

The spelling of 16406645 in words is "sixteen million, four hundred six thousand, six hundred forty-five".