1277704920407 has 2 divisors, whose sum is σ = 1277704920408. Its totient is φ = 1277704920406.

The previous prime is 1277704920367. The next prime is 1277704920413. The reversal of 1277704920407 is 7040294077721.

It is a strong prime.

It is an emirp because it is prime and its reverse (7040294077721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1277704920407 - 2¹⁰ = 1277704919383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277704920497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638852460203 + 638852460204.

It is an arithmetic number, because the mean of its divisors is an integer number (638852460204).

Almost surely, 2^{1277704920407} is an apocalyptic number.

1277704920407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277704920407 is an equidigital number, since it uses as much as digits as its factorization.

1277704920407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 1277704920407 in words is "one trillion, two hundred seventy-seven billion, seven hundred four million, nine hundred twenty thousand, four hundred seven".