188726121853 has 2 divisors, whose sum is σ = 188726121854. Its totient is φ = 188726121852.

The previous prime is 188726121827. The next prime is 188726121887. The reversal of 188726121853 is 358121627881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95225936569 + 93500185284 = 308587^2 + 305778^2 .

It is an emirp because it is prime and its reverse (358121627881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188726121853 - 2²⁹ = 188189250941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188726121853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188726121053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94363060926 + 94363060927.

It is an arithmetic number, because the mean of its divisors is an integer number (94363060927).

Almost surely, 2^188726121853 is an apocalyptic number.

It is an amenable number.

188726121853 is a deficient number, since it is larger than the sum of its proper divisors (1).

188726121853 is an equidigital number, since it uses as much as digits as its factorization.

188726121853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 52.

The spelling of 188726121853 in words is "one hundred eighty-eight billion, seven hundred twenty-six million, one hundred twenty-one thousand, eight hundred fifty-three".