745218868 has 18 divisors (see below), whose sum is σ = 1385361446. Its totient is φ = 350690688.

The previous prime is 745218863. The next prime is 745218913. The reversal of 745218868 is 868812547.

It can be written as a sum of positive squares in 3 ways, for example, as 353891344 + 391327524 = 18812^2 + 19782^2 .

It is a super-2 number, since 2×745218868² = 1110702322446402848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745218863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321171 + ... + 323482.

Almost surely, 2^745218868 is an apocalyptic number.

It is an amenable number.

745218868 is a deficient number, since it is larger than the sum of its proper divisors (640142578).

745218868 is a wasteful number, since it uses less digits than its factorization.

745218868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644691 (or 644672 counting only the distinct ones).

The product of its digits is 860160, while the sum is 49.

The square root of 745218868 is about 27298.6971850306. The cubic root of 745218868 is about 906.6255363286.

The spelling of 745218868 in words is "seven hundred forty-five million, two hundred eighteen thousand, eight hundred sixty-eight".