57111022156561 has 2 divisors, whose sum is σ = 57111022156562. Its totient is φ = 57111022156560.

The previous prime is 57111022156553. The next prime is 57111022156607. The reversal of 57111022156561 is 16565122011175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56851298400400 + 259723756161 = 7539980^2 + 509631^2 .

It is a cyclic number.

It is not a de Polignac number, because 57111022156561 - 2³ = 57111022156553 is a prime.

It is not a weakly prime, because it can be changed into another prime (57111022156511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28555511078280 + 28555511078281.

It is an arithmetic number, because the mean of its divisors is an integer number (28555511078281).

Almost surely, 2^{57111022156561} is an apocalyptic number.

It is an amenable number.

57111022156561 is a deficient number, since it is larger than the sum of its proper divisors (1).

57111022156561 is an equidigital number, since it uses as much as digits as its factorization.

57111022156561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 43.

The spelling of 57111022156561 in words is "fifty-seven trillion, one hundred eleven billion, twenty-two million, one hundred fifty-six thousand, five hundred sixty-one".