378166847693 has 2 divisors, whose sum is σ = 378166847694. Its totient is φ = 378166847692.

The previous prime is 378166847671. The next prime is 378166847699. The reversal of 378166847693 is 396748661873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334340681284 + 43826166409 = 578222^2 + 209347^2 .

It is a cyclic number.

It is not a de Polignac number, because 378166847693 - 2⁶ = 378166847629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378166847699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189083423846 + 189083423847.

It is an arithmetic number, because the mean of its divisors is an integer number (189083423847).

Almost surely, 2^378166847693 is an apocalyptic number.

It is an amenable number.

378166847693 is a deficient number, since it is larger than the sum of its proper divisors (1).

378166847693 is an equidigital number, since it uses as much as digits as its factorization.

378166847693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 68.

The spelling of 378166847693 in words is "three hundred seventy-eight billion, one hundred sixty-six million, eight hundred forty-seven thousand, six hundred ninety-three".