1277872364663 has 2 divisors, whose sum is σ = 1277872364664. Its totient is φ = 1277872364662.

The previous prime is 1277872364633. The next prime is 1277872364677. The reversal of 1277872364663 is 3664632787721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1277872364663 - 2²⁰ = 1277871316087 is a prime.

It is a super-2 number, since 2×1277872364663² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1277872364596 and 1277872364605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277872364633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638936182331 + 638936182332.

It is an arithmetic number, because the mean of its divisors is an integer number (638936182332).

Almost surely, 2^{1277872364663} is an apocalyptic number.

1277872364663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277872364663 is an equidigital number, since it uses as much as digits as its factorization.

1277872364663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 62.

The spelling of 1277872364663 in words is "one trillion, two hundred seventy-seven billion, eight hundred seventy-two million, three hundred sixty-four thousand, six hundred sixty-three".