2385776381 has 2 divisors, whose sum is σ = 2385776382. Its totient is φ = 2385776380.

The previous prime is 2385776369. The next prime is 2385776423. The reversal of 2385776381 is 1836775832.

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., 1805400100 + 580376281 = 42490^2 + 24091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2385776381 is a prime.

It is a super-2 number, since 2×2385776381² = 11383857880274914322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2385776681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1192888190 + 1192888191.

It is an arithmetic number, because the mean of its divisors is an integer number (1192888191).

Almost surely, 2^2385776381 is an apocalyptic number.

It is an amenable number.

2385776381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2385776381 is an equidigital number, since it uses as much as digits as its factorization.

2385776381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 2385776381 is about 48844.4099258042. The cubic root of 2385776381 is about 1336.2157247012.

The spelling of 2385776381 in words is "two billion, three hundred eighty-five million, seven hundred seventy-six thousand, three hundred eighty-one".