8057555521 has 2 divisors, whose sum is σ = 8057555522. Its totient is φ = 8057555520.

The previous prime is 8057555507. The next prime is 8057555563. The reversal of 8057555521 is 1255557508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8057037121 + 518400 = 89761^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 8057555521 - 2⁷ = 8057555393 is a prime.

It is not a weakly prime, because it can be changed into another prime (8057555021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4028777760 + 4028777761.

It is an arithmetic number, because the mean of its divisors is an integer number (4028777761).

Almost surely, 2^8057555521 is an apocalyptic number.

It is an amenable number.

8057555521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8057555521 is an equidigital number, since it uses as much as digits as its factorization.

8057555521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350000, while the sum is 43.

The square root of 8057555521 is about 89763.8876219162. The cubic root of 8057555521 is about 2004.7848369554.

The spelling of 8057555521 in words is "eight billion, fifty-seven million, five hundred fifty-five thousand, five hundred twenty-one".