1813156689 has 16 divisors (see below), whose sum is σ = 2466219392. Its totient is φ = 1184675328.

The previous prime is 1813156687. The next prime is 1813156703. The reversal of 1813156689 is 9866513181.

It is not a de Polignac number, because 1813156689 - 2¹ = 1813156687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813156687) 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 15 ways as a sum of consecutive naturals, for example, 274 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (154138712).

Almost surely, 2^1813156689 is an apocalyptic number.

It is an amenable number.

1813156689 is a deficient number, since it is larger than the sum of its proper divisors (653062703).

1813156689 is a wasteful number, since it uses less digits than its factorization.

1813156689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60696.

The product of its digits is 311040, while the sum is 48.

The square root of 1813156689 is about 42581.1776375431. The cubic root of 1813156689 is about 1219.3969717562.

The spelling of 1813156689 in words is "one billion, eight hundred thirteen million, one hundred fifty-six thousand, six hundred eighty-nine".