1813078945139 has 16 divisors (see below), whose sum is σ = 2264594585856. Its totient is φ = 1410205960800.

The previous prime is 1813078945091. The next prime is 1813078945157. The reversal of 1813078945139 is 9315498703181.

It is not a de Polignac number, because 1813078945139 - 2²⁰ = 1813077896563 is a prime.

It is a super-2 number, since 2×1813078945139² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1813078945189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21481172 + ... + 21565409.

It is an arithmetic number, because the mean of its divisors is an integer number (141537161616).

Almost surely, 2^{1813078945139} is an apocalyptic number.

1813078945139 is a deficient number, since it is larger than the sum of its proper divisors (451515640717).

1813078945139 is a wasteful number, since it uses less digits than its factorization.

1813078945139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43047146.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 1813078945139 in words is "one trillion, eight hundred thirteen billion, seventy-eight million, nine hundred forty-five thousand, one hundred thirty-nine".