202116645 has 12 divisors (see below), whose sum is σ = 350335596. Its totient is φ = 107795520.

The previous prime is 202116643. The next prime is 202116653. The reversal of 202116645 is 546611202.

202116645 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 16 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30008484 + 172108161 = 5478^2 + 13119^2 .

It is not a de Polignac number, because 202116645 - 2¹ = 202116643 is a prime.

It is a super-2 number, since 2×202116645² = 81702276372112050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202116643) 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, 2245696 + ... + 2245785.

It is an arithmetic number, because the mean of its divisors is an integer number (29194633).

Almost surely, 2^202116645 is an apocalyptic number.

It is an amenable number.

202116645 is a deficient number, since it is larger than the sum of its proper divisors (148218951).

202116645 is a wasteful number, since it uses less digits than its factorization.

202116645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491492 (or 4491489 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 202116645 is about 14216.7733681029. The cubic root of 202116645 is about 586.8593481180.

Adding to 202116645 its reverse (546611202), we get a palindrome (748727847).

The spelling of 202116645 in words is "two hundred two million, one hundred sixteen thousand, six hundred forty-five".