1428206645777 has 2 divisors, whose sum is σ = 1428206645778. Its totient is φ = 1428206645776.

The previous prime is 1428206645771. The next prime is 1428206645791. The reversal of 1428206645777 is 7775466028241.

It is a Cunningham number, because it is equal to 1195076²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1428206645776 + 1 = 1195076^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428206645777 - 2⁸ = 1428206645521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428206645771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714103322888 + 714103322889.

It is an arithmetic number, because the mean of its divisors is an integer number (714103322889).

Almost surely, 2^{1428206645777} is an apocalyptic number.

It is an amenable number.

1428206645777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428206645777 is an equidigital number, since it uses as much as digits as its factorization.

1428206645777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31610880, while the sum is 59.

The spelling of 1428206645777 in words is "one trillion, four hundred twenty-eight billion, two hundred six million, six hundred forty-five thousand, seven hundred seventy-seven".