16445745 has 12 divisors (see below), whose sum is σ = 28506036. Its totient is φ = 8771040.

The previous prime is 16445743. The next prime is 16445747. The reversal of 16445745 is 54754461.

16445745 is a `hidden beast` number, since 1 + 644 + 5 + 7 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (16445743) and next prime (16445747).

It can be written as a sum of positive squares in 2 ways, for example, as 4769856 + 11675889 = 2184^2 + 3417^2 .

It is not a de Polignac number, because 16445745 - 2¹ = 16445743 is a prime.

It is a super-3 number, since 3×16445745³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16445743) 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, 182686 + ... + 182775.

It is an arithmetic number, because the mean of its divisors is an integer number (2375503).

Almost surely, 2^16445745 is an apocalyptic number.

16445745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16445745 is a deficient number, since it is larger than the sum of its proper divisors (12060291).

16445745 is a wasteful number, since it uses less digits than its factorization.

16445745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365472 (or 365469 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 16445745 is about 4055.3353745406. The cubic root of 16445745 is about 254.3028245952.

The spelling of 16445745 in words is "sixteen million, four hundred forty-five thousand, seven hundred forty-five".