18376136545 has 16 divisors (see below), whose sum is σ = 23822562960. Its totient is φ = 13527247104.

The previous prime is 18376136533. The next prime is 18376136561. The reversal of 18376136545 is 54563167381.

It can be written as a sum of positive squares in 8 ways, for example, as 7826587024 + 10549549521 = 88468^2 + 102711^2 .

It is a cyclic number.

It is not a de Polignac number, because 18376136545 - 2²¹ = 18374039393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425310 + ... + 466519.

It is an arithmetic number, because the mean of its divisors is an integer number (1488910185).

Almost surely, 2^18376136545 is an apocalyptic number.

It is an amenable number.

18376136545 is a deficient number, since it is larger than the sum of its proper divisors (5446426415).

18376136545 is a wasteful number, since it uses less digits than its factorization.

18376136545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892164.

The product of its digits is 1814400, while the sum is 49.

The spelling of 18376136545 in words is "eighteen billion, three hundred seventy-six million, one hundred thirty-six thousand, five hundred forty-five".