1255564604401 has 2 divisors, whose sum is σ = 1255564604402. Its totient is φ = 1255564604400.

The previous prime is 1255564604387. The next prime is 1255564604449. The reversal of 1255564604401 is 1044064655521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963695622400 + 291868982001 = 981680^2 + 540249^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255564604401 - 2⁹ = 1255564603889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255564604471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627782302200 + 627782302201.

It is an arithmetic number, because the mean of its divisors is an integer number (627782302201).

Almost surely, 2^{1255564604401} is an apocalyptic number.

It is an amenable number.

1255564604401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255564604401 is an equidigital number, since it uses as much as digits as its factorization.

1255564604401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 1255564604401 in words is "one trillion, two hundred fifty-five billion, five hundred sixty-four million, six hundred four thousand, four hundred one".