378829986461 has 2 divisors, whose sum is σ = 378829986462. Its totient is φ = 378829986460.

The previous prime is 378829986401. The next prime is 378829986463. The reversal of 378829986461 is 164689928873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277024321561 + 101805664900 = 526331^2 + 319070^2 .

It is a cyclic number.

It is not a de Polignac number, because 378829986461 - 2¹⁰ = 378829985437 is a prime.

Together with 378829986463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378829986463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189414993230 + 189414993231.

It is an arithmetic number, because the mean of its divisors is an integer number (189414993231).

Almost surely, 2^378829986461 is an apocalyptic number.

It is an amenable number.

378829986461 is a deficient number, since it is larger than the sum of its proper divisors (1).

378829986461 is an equidigital number, since it uses as much as digits as its factorization.

378829986461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250822656, while the sum is 71.

The spelling of 378829986461 in words is "three hundred seventy-eight billion, eight hundred twenty-nine million, nine hundred eighty-six thousand, four hundred sixty-one".