18586149545 has 4 divisors (see below), whose sum is σ = 22303379460. Its totient is φ = 14868919632.

The previous prime is 18586149493. The next prime is 18586149553. The reversal of 18586149545 is 54594168581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11056943104 + 7529206441 = 105152^2 + 86771^2 .

It is a cyclic number.

It is not a de Polignac number, because 18586149545 - 2⁸ = 18586149289 is a prime.

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, 1858614950 + ... + 1858614959.

It is an arithmetic number, because the mean of its divisors is an integer number (5575844865).

Almost surely, 2^18586149545 is an apocalyptic number.

It is an amenable number.

18586149545 is a deficient number, since it is larger than the sum of its proper divisors (3717229915).

18586149545 is an equidigital number, since it uses as much as digits as its factorization.

18586149545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717229914.

The product of its digits is 6912000, while the sum is 56.

The spelling of 18586149545 in words is "eighteen billion, five hundred eighty-six million, one hundred forty-nine thousand, five hundred forty-five".