8519406881 has 2 divisors, whose sum is σ = 8519406882. Its totient is φ = 8519406880.

The previous prime is 8519406871. The next prime is 8519406913. The reversal of 8519406881 is 1886049158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8256448225 + 262958656 = 90865^2 + 16216^2 .

It is a cyclic number.

It is not a de Polignac number, because 8519406881 - 2³⁰ = 7445665057 is a prime.

It is a super-2 number, since 2×8519406881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8519406871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259703440 + 4259703441.

It is an arithmetic number, because the mean of its divisors is an integer number (4259703441).

Almost surely, 2^8519406881 is an apocalyptic number.

It is an amenable number.

8519406881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8519406881 is an equidigital number, since it uses as much as digits as its factorization.

8519406881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 50.

The square root of 8519406881 is about 92300.6331560082. The cubic root of 8519406881 is about 2042.3795506925.

The spelling of 8519406881 in words is "eight billion, five hundred nineteen million, four hundred six thousand, eight hundred eighty-one".