855036881 has 2 divisors, whose sum is σ = 855036882. Its totient is φ = 855036880.

The previous prime is 855036877. The next prime is 855036901. The reversal of 855036881 is 188630558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784896256 + 70140625 = 28016^2 + 8375^2 .

It is a cyclic number.

It is not a de Polignac number, because 855036881 - 2² = 855036877 is a prime.

It is a super-2 number, since 2×855036881² = 1462176135740416322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855036821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427518440 + 427518441.

It is an arithmetic number, because the mean of its divisors is an integer number (427518441).

Almost surely, 2^855036881 is an apocalyptic number.

It is an amenable number.

855036881 is a deficient number, since it is larger than the sum of its proper divisors (1).

855036881 is an equidigital number, since it uses as much as digits as its factorization.

855036881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 855036881 is about 29241.0136794195. The cubic root of 855036881 is about 949.1356426119.

The spelling of 855036881 in words is "eight hundred fifty-five million, thirty-six thousand, eight hundred eighty-one".