6940581345 has 96 divisors (see below), whose sum is σ = 13043721600. Its totient is φ = 3403026432.

The previous prime is 6940581343. The next prime is 6940581353. The reversal of 6940581345 is 5431850496.

6940581345 is a `hidden beast` number, since 69 + 4 + 0 + 581 + 3 + 4 + 5 = 666.

It is not a de Polignac number, because 6940581345 - 2¹ = 6940581343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6940581345.

It is not an unprimeable number, because it can be changed into a prime (6940581341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4394766 + ... + 4396344.

It is an arithmetic number, because the mean of its divisors is an integer number (135872100).

Almost surely, 2^6940581345 is an apocalyptic number.

It is an amenable number.

6940581345 is a deficient number, since it is larger than the sum of its proper divisors (6103140255).

6940581345 is a wasteful number, since it uses less digits than its factorization.

6940581345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 6940581345 is about 83310.1515122857. The cubic root of 6940581345 is about 1907.5032337061.

The spelling of 6940581345 in words is "six billion, nine hundred forty million, five hundred eighty-one thousand, three hundred forty-five".