18745540070545 has 8 divisors (see below), whose sum is σ = 22503445381224. Its totient is φ = 14990567192064.

The previous prime is 18745540070531. The next prime is 18745540070549. The reversal of 18745540070545 is 54507004554781.

It is a Cunningham number, because it is equal to 4329612²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 18745540070544 = 1^2 + 4329612^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18745540070545 - 2⁵ = 18745540070513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18745540070549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733093984 + ... + 733119553.

It is an arithmetic number, because the mean of its divisors is an integer number (2812930672653).

Almost surely, 2^{18745540070545} is an apocalyptic number.

It is an amenable number.

18745540070545 is a deficient number, since it is larger than the sum of its proper divisors (3757905310679).

18745540070545 is a wasteful number, since it uses less digits than its factorization.

18745540070545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466216099.

The product of its (nonzero) digits is 15680000, while the sum is 55.

The spelling of 18745540070545 in words is "eighteen trillion, seven hundred forty-five billion, five hundred forty million, seventy thousand, five hundred forty-five".