7081218881 has 8 divisors (see below), whose sum is σ = 7855898400. Its totient is φ = 6328361440.

The previous prime is 7081218769. The next prime is 7081218941. The reversal of 7081218881 is 1888121807.

7081218881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7081218881 - 2¹⁸ = 7080956737 is a prime.

It is a super-2 number, since 2×7081218881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7081218581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5454836 + ... + 5456133.

It is an arithmetic number, because the mean of its divisors is an integer number (981987300).

Almost surely, 2^7081218881 is an apocalyptic number.

It is an amenable number.

7081218881 is a deficient number, since it is larger than the sum of its proper divisors (774679519).

7081218881 is a wasteful number, since it uses less digits than its factorization.

7081218881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10911039.

The product of its (nonzero) digits is 57344, while the sum is 44.

The square root of 7081218881 is about 84149.9784967293. The cubic root of 7081218881 is about 1920.3011391989.

The spelling of 7081218881 in words is "seven billion, eighty-one million, two hundred eighteen thousand, eight hundred eighty-one".