2071396643977 has 2 divisors, whose sum is σ = 2071396643978. Its totient is φ = 2071396643976.

The previous prime is 2071396643933. The next prime is 2071396644001. The reversal of 2071396643977 is 7793466931702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1951863262281 + 119533381696 = 1397091^2 + 345736^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071396643977 - 2²³ = 2071388255369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2071396643917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035698321988 + 1035698321989.

It is an arithmetic number, because the mean of its divisors is an integer number (1035698321989).

Almost surely, 2^{2071396643977} is an apocalyptic number.

It is an amenable number.

2071396643977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071396643977 is an equidigital number, since it uses as much as digits as its factorization.

2071396643977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72013536, while the sum is 64.

The spelling of 2071396643977 in words is "two trillion, seventy-one billion, three hundred ninety-six million, six hundred forty-three thousand, nine hundred seventy-seven".