378811826699 has 2 divisors, whose sum is σ = 378811826700. Its totient is φ = 378811826698.

The previous prime is 378811826587. The next prime is 378811826741. The reversal of 378811826699 is 996628118873.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 378811826699 - 2²⁴ = 378795049483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (378811823699) 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, 189405913349 + 189405913350.

It is an arithmetic number, because the mean of its divisors is an integer number (189405913350).

Almost surely, 2^378811826699 is an apocalyptic number.

378811826699 is a deficient number, since it is larger than the sum of its proper divisors (1).

378811826699 is an equidigital number, since it uses as much as digits as its factorization.

378811826699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 68.

The spelling of 378811826699 in words is "three hundred seventy-eight billion, eight hundred eleven million, eight hundred twenty-six thousand, six hundred ninety-nine".