745910185 has 4 divisors (see below), whose sum is σ = 895092228. Its totient is φ = 596728144.

The previous prime is 745910177. The next prime is 745910197. The reversal of 745910185 is 581019547.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581019547 = 37 ⋅15703231.

It can be written as a sum of positive squares in 2 ways, for example, as 152695449 + 593214736 = 12357^2 + 24356^2 .

It is a cyclic number.

It is not a de Polignac number, because 745910185 - 2³ = 745910177 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74591014 + ... + 74591023.

It is an arithmetic number, because the mean of its divisors is an integer number (223773057).

Almost surely, 2^745910185 is an apocalyptic number.

It is an amenable number.

745910185 is a deficient number, since it is larger than the sum of its proper divisors (149182043).

745910185 is a wasteful number, since it uses less digits than its factorization.

745910185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149182042.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 745910185 is about 27311.3563376116. The cubic root of 745910185 is about 906.9057993771.

The spelling of 745910185 in words is "seven hundred forty-five million, nine hundred ten thousand, one hundred eighty-five".