4188745381 has 2 divisors, whose sum is σ = 4188745382. Its totient is φ = 4188745380.

The previous prime is 4188745333. The next prime is 4188745391. The reversal of 4188745381 is 1835478814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2266712100 + 1922033281 = 47610^2 + 43841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4188745381 is a prime.

It is a super-2 number, since 2×4188745381² = 35091175733697670322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4188745331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2094372690 + 2094372691.

It is an arithmetic number, because the mean of its divisors is an integer number (2094372691).

Almost surely, 2^4188745381 is an apocalyptic number.

It is an amenable number.

4188745381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4188745381 is an equidigital number, since it uses as much as digits as its factorization.

4188745381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 49.

The square root of 4188745381 is about 64720.5174654838. The cubic root of 4188745381 is about 1611.9862040794.

The spelling of 4188745381 in words is "four billion, one hundred eighty-eight million, seven hundred forty-five thousand, three hundred eighty-one".