6945418891 has 4 divisors (see below), whose sum is σ = 6961533984. Its totient is φ = 6929303800.

The previous prime is 6945418889. The next prime is 6945418913. The reversal of 6945418891 is 1988145496.

6945418891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6945418891 - 2¹ = 6945418889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6945418691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8056900 + ... + 8057761.

It is an arithmetic number, because the mean of its divisors is an integer number (1740383496).

Almost surely, 2^6945418891 is an apocalyptic number.

6945418891 is a deficient number, since it is larger than the sum of its proper divisors (16115093).

6945418891 is a wasteful number, since it uses less digits than its factorization.

6945418891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16115092.

The product of its digits is 2488320, while the sum is 55.

The square root of 6945418891 is about 83339.1798075791. The cubic root of 6945418891 is about 1907.9463037767.

The spelling of 6945418891 in words is "six billion, nine hundred forty-five million, four hundred eighteen thousand, eight hundred ninety-one".