745181857 has 12 divisors (see below), whose sum is σ = 867595860. Its totient is φ = 638173536.

The previous prime is 745181821. The next prime is 745181861. The reversal of 745181857 is 758181547.

It can be written as a sum of positive squares in 2 ways, for example, as 370023696 + 375158161 = 19236^2 + 19369^2 .

It is not a de Polignac number, because 745181857 - 2¹⁹ = 744657569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745181897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56619 + ... + 68527.

It is an arithmetic number, because the mean of its divisors is an integer number (72299655).

Almost surely, 2^745181857 is an apocalyptic number.

It is an amenable number.

745181857 is a deficient number, since it is larger than the sum of its proper divisors (122414003).

745181857 is a wasteful number, since it uses less digits than its factorization.

745181857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200 (or 13193 counting only the distinct ones).

The product of its digits is 313600, while the sum is 46.

The square root of 745181857 is about 27298.0192871204. The cubic root of 745181857 is about 906.6105270141.

The spelling of 745181857 in words is "seven hundred forty-five million, one hundred eighty-one thousand, eight hundred fifty-seven".