813145618 has 8 divisors (see below), whose sum is σ = 1220437260. Its totient is φ = 406333200.

The previous prime is 813145607. The next prime is 813145621. The reversal of 813145618 is 816541318.

813145618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 812991169 + 154449 = 28513^2 + 393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×813145618² = 1322411592145203848, which contains 22 as substring.

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, 115533 + ... + 122368.

Almost surely, 2^813145618 is an apocalyptic number.

813145618 is a deficient number, since it is larger than the sum of its proper divisors (407291642).

813145618 is a wasteful number, since it uses less digits than its factorization.

813145618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239612.

The product of its digits is 23040, while the sum is 37.

The square root of 813145618 is about 28515.7082675497. The cubic root of 813145618 is about 933.3748803217.

The spelling of 813145618 in words is "eight hundred thirteen million, one hundred forty-five thousand, six hundred eighteen".