185857204453 has 2 divisors, whose sum is σ = 185857204454. Its totient is φ = 185857204452.

The previous prime is 185857204397. The next prime is 185857204487. The reversal of 185857204453 is 354402758581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123498124929 + 62359079524 = 351423^2 + 249718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185857204453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 185857204453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185857294453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92928602226 + 92928602227.

It is an arithmetic number, because the mean of its divisors is an integer number (92928602227).

Almost surely, 2^185857204453 is an apocalyptic number.

It is an amenable number.

185857204453 is a deficient number, since it is larger than the sum of its proper divisors (1).

185857204453 is an equidigital number, since it uses as much as digits as its factorization.

185857204453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 185857204453 in words is "one hundred eighty-five billion, eight hundred fifty-seven million, two hundred four thousand, four hundred fifty-three".