1277020912847 has 2 divisors, whose sum is σ = 1277020912848. Its totient is φ = 1277020912846.

The previous prime is 1277020912841. The next prime is 1277020912879. The reversal of 1277020912847 is 7482190207721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1277020912847 - 2⁴ = 1277020912831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1277020912795 and 1277020912804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277020912841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638510456423 + 638510456424.

It is an arithmetic number, because the mean of its divisors is an integer number (638510456424).

Almost surely, 2^{1277020912847} is an apocalyptic number.

1277020912847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277020912847 is an equidigital number, since it uses as much as digits as its factorization.

1277020912847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 1277020912847 in words is "one trillion, two hundred seventy-seven billion, twenty million, nine hundred twelve thousand, eight hundred forty-seven".