378807286777 has 2 divisors, whose sum is σ = 378807286778. Its totient is φ = 378807286776.

The previous prime is 378807286691. The next prime is 378807286783. The reversal of 378807286777 is 777682708873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371592653056 + 7214633721 = 609584^2 + 84939^2 .

It is a cyclic number.

It is not a de Polignac number, because 378807286777 - 2²³ = 378798898169 is a prime.

It is not a weakly prime, because it can be changed into another prime (378807286787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189403643388 + 189403643389.

It is an arithmetic number, because the mean of its divisors is an integer number (189403643389).

Almost surely, 2^378807286777 is an apocalyptic number.

It is an amenable number.

378807286777 is a deficient number, since it is larger than the sum of its proper divisors (1).

378807286777 is an equidigital number, since it uses as much as digits as its factorization.

378807286777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 309786624, while the sum is 70.

The spelling of 378807286777 in words is "three hundred seventy-eight billion, eight hundred seven million, two hundred eighty-six thousand, seven hundred seventy-seven".