1277654420659 has 2 divisors, whose sum is σ = 1277654420660. Its totient is φ = 1277654420658.

The previous prime is 1277654420639. The next prime is 1277654420719. The reversal of 1277654420659 is 9560244567721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1277654420659 - 2¹³ = 1277654412467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277654420639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638827210329 + 638827210330.

It is an arithmetic number, because the mean of its divisors is an integer number (638827210330).

Almost surely, 2^{1277654420659} is an apocalyptic number.

1277654420659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277654420659 is an equidigital number, since it uses as much as digits as its factorization.

1277654420659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 1277654420659 in words is "one trillion, two hundred seventy-seven billion, six hundred fifty-four million, four hundred twenty thousand, six hundred fifty-nine".