17873454545 has 4 divisors (see below), whose sum is σ = 21448145460. Its totient is φ = 14298763632.

The previous prime is 17873454481. The next prime is 17873454553. The reversal of 17873454545 is 54545437871.

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 4996651969 + 12876802576 = 70687^2 + 113476^2 .

It is a cyclic number.

It is not a de Polignac number, because 17873454545 - 2⁶ = 17873454481 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, 1787345450 + ... + 1787345459.

It is an arithmetic number, because the mean of its divisors is an integer number (5362036365).

Almost surely, 2^17873454545 is an apocalyptic number.

It is an amenable number.

17873454545 is a deficient number, since it is larger than the sum of its proper divisors (3574690915).

17873454545 is an equidigital number, since it uses as much as digits as its factorization.

17873454545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574690914.

The product of its digits is 9408000, while the sum is 53.

The spelling of 17873454545 in words is "seventeen billion, eight hundred seventy-three million, four hundred fifty-four thousand, five hundred forty-five".