2855493581 has 2 divisors, whose sum is σ = 2855493582. Its totient is φ = 2855493580.

The previous prime is 2855493577. The next prime is 2855493593. The reversal of 2855493581 is 1853945582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1986128356 + 869365225 = 44566^2 + 29485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2855493581 - 2² = 2855493577 is a prime.

It is a super-2 number, since 2×2855493581² = 16307687182264407122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2855495581) 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, 1427746790 + 1427746791.

It is an arithmetic number, because the mean of its divisors is an integer number (1427746791).

Almost surely, 2^2855493581 is an apocalyptic number.

It is an amenable number.

2855493581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855493581 is an equidigital number, since it uses as much as digits as its factorization.

2855493581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728000, while the sum is 50.

The square root of 2855493581 is about 53436.8185898075. The cubic root of 2855493581 is about 1418.7103249438.

The spelling of 2855493581 in words is "two billion, eight hundred fifty-five million, four hundred ninety-three thousand, five hundred eighty-one".