16645465 has 16 divisors (see below), whose sum is σ = 21349008. Its totient is φ = 12414976.

The previous prime is 16645427. The next prime is 16645469. The reversal of 16645465 is 56454661.

It can be written as a sum of positive squares in 8 ways, for example, as 1247689 + 15397776 = 1117^2 + 3924^2 .

It is a cyclic number.

It is not a de Polignac number, because 16645465 - 2⁷ = 16645337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16645469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8739 + ... + 10471.

It is an arithmetic number, because the mean of its divisors is an integer number (1334313).

Almost surely, 2^16645465 is an apocalyptic number.

It is an amenable number.

16645465 is a deficient number, since it is larger than the sum of its proper divisors (4703543).

16645465 is a wasteful number, since it uses less digits than its factorization.

16645465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868.

The product of its digits is 86400, while the sum is 37.

The square root of 16645465 is about 4079.8854150576. The cubic root of 16645465 is about 255.3281179225.

It can be divided in two parts, 1 and 6645465, that added together give a palindrome (6645466).

The spelling of 16645465 in words is "sixteen million, six hundred forty-five thousand, four hundred sixty-five".