745216218 has 24 divisors (see below), whose sum is σ = 1620927828. Its totient is φ = 247437312.

The previous prime is 745216207. The next prime is 745216229. The reversal of 745216218 is 812612547.

745216218 is a `hidden beast` number, since 7 + 4 + 5 + 21 + 621 + 8 = 666.

745216218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (745216207) and next prime (745216229).

It can be written as a sum of positive squares in 2 ways, for example, as 728838009 + 16378209 = 26997^2 + 4047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75921 + ... + 85172.

Almost surely, 2^745216218 is an apocalyptic number.

745216218 is an abundant number, since it is smaller than the sum of its proper divisors (875711610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745216218 is a wasteful number, since it uses less digits than its factorization.

745216218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161358 (or 161355 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 745216218 is about 27298.6486478727. The cubic root of 745216218 is about 906.6244616732.

The spelling of 745216218 in words is "seven hundred forty-five million, two hundred sixteen thousand, two hundred eighteen".