188278246493 has 2 divisors, whose sum is σ = 188278246494. Its totient is φ = 188278246492.

The previous prime is 188278246489. The next prime is 188278246571. The reversal of 188278246493 is 394642872881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164931017689 + 23347228804 = 406117^2 + 152798^2 .

It is a cyclic number.

It is not a de Polignac number, because 188278246493 - 2² = 188278246489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188278246423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94139123246 + 94139123247.

It is an arithmetic number, because the mean of its divisors is an integer number (94139123247).

Almost surely, 2^188278246493 is an apocalyptic number.

It is an amenable number.

188278246493 is a deficient number, since it is larger than the sum of its proper divisors (1).

188278246493 is an equidigital number, since it uses as much as digits as its factorization.

188278246493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 62.

The spelling of 188278246493 in words is "one hundred eighty-eight billion, two hundred seventy-eight million, two hundred forty-six thousand, four hundred ninety-three".