185645618453 has 4 divisors (see below), whose sum is σ = 185657777760. Its totient is φ = 185633459148.

The previous prime is 185645618443. The next prime is 185645618503. The reversal of 185645618453 is 354816546581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185645618453 is a prime.

It is a super-2 number, since 2×185645618453² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185645618443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6056723 + ... + 6087296.

It is an arithmetic number, because the mean of its divisors is an integer number (46414444440).

Almost surely, 2^185645618453 is an apocalyptic number.

It is an amenable number.

185645618453 is a deficient number, since it is larger than the sum of its proper divisors (12159307).

185645618453 is a wasteful number, since it uses less digits than its factorization.

185645618453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12159306.

The product of its digits is 13824000, while the sum is 56.

The spelling of 185645618453 in words is "one hundred eighty-five billion, six hundred forty-five million, six hundred eighteen thousand, four hundred fifty-three".