8557277854121 has 2 divisors, whose sum is σ = 8557277854122. Its totient is φ = 8557277854120.

The previous prime is 8557277854109. The next prime is 8557277854157. The reversal of 8557277854121 is 1214587727558.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7994869350400 + 562408503721 = 2827520^2 + 749939^2 .

It is a cyclic number.

It is not a de Polignac number, because 8557277854121 - 2¹⁸ = 8557277591977 is a prime.

It is not a weakly prime, because it can be changed into another prime (8557277854621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278638927060 + 4278638927061.

It is an arithmetic number, because the mean of its divisors is an integer number (4278638927061).

Almost surely, 2^{8557277854121} is an apocalyptic number.

It is an amenable number.

8557277854121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8557277854121 is an equidigital number, since it uses as much as digits as its factorization.

8557277854121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904000, while the sum is 62.

The spelling of 8557277854121 in words is "eight trillion, five hundred fifty-seven billion, two hundred seventy-seven million, eight hundred fifty-four thousand, one hundred twenty-one".