1277506754401 has 2 divisors, whose sum is σ = 1277506754402. Its totient is φ = 1277506754400.

The previous prime is 1277506754387. The next prime is 1277506754437. The reversal of 1277506754401 is 1044576057721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1025407365376 + 252099389025 = 1012624^2 + 502095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277506754401 - 2⁹ = 1277506753889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277506754441) 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, 638753377200 + 638753377201.

It is an arithmetic number, because the mean of its divisors is an integer number (638753377201).

Almost surely, 2^{1277506754401} is an apocalyptic number.

It is an amenable number.

1277506754401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277506754401 is an equidigital number, since it uses as much as digits as its factorization.

1277506754401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 1277506754401 in words is "one trillion, two hundred seventy-seven billion, five hundred six million, seven hundred fifty-four thousand, four hundred one".