1421716851077 has 2 divisors, whose sum is σ = 1421716851078. Its totient is φ = 1421716851076.

The previous prime is 1421716851073. The next prime is 1421716851097. The reversal of 1421716851077 is 7701586171241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156052889601 + 265663961476 = 1075199^2 + 515426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421716851077 - 2² = 1421716851073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421716851073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710858425538 + 710858425539.

It is an arithmetic number, because the mean of its divisors is an integer number (710858425539).

Almost surely, 2^{1421716851077} is an apocalyptic number.

It is an amenable number.

1421716851077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421716851077 is an equidigital number, since it uses as much as digits as its factorization.

1421716851077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 50.

The spelling of 1421716851077 in words is "one trillion, four hundred twenty-one billion, seven hundred sixteen million, eight hundred fifty-one thousand, seventy-seven".