40188668305213 has 2 divisors, whose sum is σ = 40188668305214. Its totient is φ = 40188668305212.

The previous prime is 40188668305187. The next prime is 40188668305229. The reversal of 40188668305213 is 31250386688104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25669847837764 + 14518820467449 = 5066542^2 + 3810357^2 .

It is a cyclic number.

It is not a de Polignac number, because 40188668305213 - 2¹⁷ = 40188668174141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40188668305613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20094334152606 + 20094334152607.

It is an arithmetic number, because the mean of its divisors is an integer number (20094334152607).

Almost surely, 2^{40188668305213} is an apocalyptic number.

It is an amenable number.

40188668305213 is a deficient number, since it is larger than the sum of its proper divisors (1).

40188668305213 is an equidigital number, since it uses as much as digits as its factorization.

40188668305213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 40188668305213 in words is "forty trillion, one hundred eighty-eight billion, six hundred sixty-eight million, three hundred five thousand, two hundred thirteen".