427645562977 has 2 divisors, whose sum is σ = 427645562978. Its totient is φ = 427645562976.

The previous prime is 427645562969. The next prime is 427645562987. The reversal of 427645562977 is 779265546724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426250988641 + 1394574336 = 652879^2 + 37344^2 .

It is a cyclic number.

It is not a de Polignac number, because 427645562977 - 2³ = 427645562969 is a prime.

It is not a weakly prime, because it can be changed into another prime (427645562987) 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, 213822781488 + 213822781489.

It is an arithmetic number, because the mean of its divisors is an integer number (213822781489).

Almost surely, 2^427645562977 is an apocalyptic number.

It is an amenable number.

427645562977 is a deficient number, since it is larger than the sum of its proper divisors (1).

427645562977 is an equidigital number, since it uses as much as digits as its factorization.

427645562977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 177811200, while the sum is 64.

The spelling of 427645562977 in words is "four hundred twenty-seven billion, six hundred forty-five million, five hundred sixty-two thousand, nine hundred seventy-seven".