618068881 has 16 divisors (see below), whose sum is σ = 675979344. Its totient is φ = 562857984.

The previous prime is 618068863. The next prime is 618068911. The reversal of 618068881 is 188860816.

It can be written as a sum of positive squares in 8 ways, for example, as 2235025 + 615833856 = 1495^2 + 24816^2 .

It is a 3-Lehmer number, since φ(618068881) divides (618068881-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 618068881 - 2⁵ = 618068849 is a prime.

It is a super-2 number, since 2×618068881² = 764018283321184322, which contains 22 as substring.

It is a deceptive number, since it divides R_618068880.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618068281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61075 + ... + 70471.

It is an arithmetic number, because the mean of its divisors is an integer number (42248709).

It is a Poulet number, since it divides 2^618068880-1.

Almost surely, 2^618068881 is an apocalyptic number.

It is an amenable number.

618068881 is a deficient number, since it is larger than the sum of its proper divisors (57910463).

618068881 is a wasteful number, since it uses less digits than its factorization.

618068881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 618068881 is about 24860.9911507969. The cubic root of 618068881 is about 851.8156717515.

The spelling of 618068881 in words is "six hundred eighteen million, sixty-eight thousand, eight hundred eighty-one".