188613928553 has 2 divisors, whose sum is σ = 188613928554. Its totient is φ = 188613928552.

The previous prime is 188613928543. The next prime is 188613928567. The reversal of 188613928553 is 355829316881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159753694864 + 28860233689 = 399692^2 + 169883^2 .

It is a cyclic number.

It is not a de Polignac number, because 188613928553 - 2⁸ = 188613928297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 188613928492 and 188613928501.

It is not a weakly prime, because it can be changed into another prime (188613928543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94306964276 + 94306964277.

It is an arithmetic number, because the mean of its divisors is an integer number (94306964277).

Almost surely, 2^188613928553 is an apocalyptic number.

It is an amenable number.

188613928553 is a deficient number, since it is larger than the sum of its proper divisors (1).

188613928553 is an equidigital number, since it uses as much as digits as its factorization.

188613928553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 59.

The spelling of 188613928553 in words is "one hundred eighty-eight billion, six hundred thirteen million, nine hundred twenty-eight thousand, five hundred fifty-three".