6881318785 has 16 divisors (see below), whose sum is σ = 9090924480. Its totient is φ = 4958677440.

The previous prime is 6881318771. The next prime is 6881318791. The reversal of 6881318785 is 5878131886.

It is not a de Polignac number, because 6881318785 - 2⁵ = 6881318753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567927 + ... + 579916.

It is an arithmetic number, because the mean of its divisors is an integer number (568182780).

Almost surely, 2^6881318785 is an apocalyptic number.

It is an amenable number.

6881318785 is a deficient number, since it is larger than the sum of its proper divisors (2209605695).

6881318785 is a wasteful number, since it uses less digits than its factorization.

6881318785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147968.

The product of its digits is 2580480, while the sum is 55.

The square root of 6881318785 is about 82953.7147148939. The cubic root of 6881318785 is about 1902.0585983989.

The spelling of 6881318785 in words is "six billion, eight hundred eighty-one million, three hundred eighteen thousand, seven hundred eighty-five".