809287878601 has 2 divisors, whose sum is σ = 809287878602. Its totient is φ = 809287878600.

The previous prime is 809287878493. The next prime is 809287878629. The reversal of 809287878601 is 106878782908.

809287878601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727397471376 + 81890407225 = 852876^2 + 286165^2 .

It is a cyclic number.

It is not a de Polignac number, because 809287878601 - 2²¹ = 809285781449 is a prime.

It is not a weakly prime, because it can be changed into another prime (809287818601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404643939300 + 404643939301.

It is an arithmetic number, because the mean of its divisors is an integer number (404643939301).

Almost surely, 2^809287878601 is an apocalyptic number.

It is an amenable number.

809287878601 is a deficient number, since it is larger than the sum of its proper divisors (1).

809287878601 is an equidigital number, since it uses as much as digits as its factorization.

809287878601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 809287878601 in words is "eight hundred nine billion, two hundred eighty-seven million, eight hundred seventy-eight thousand, six hundred one".