6845405242 has 8 divisors (see below), whose sum is σ = 11057962356. Its totient is φ = 3159417792.

The previous prime is 6845405239. The next prime is 6845405243. The reversal of 6845405242 is 2425045486.

It can be written as a sum of positive squares in 2 ways, for example, as 6082596081 + 762809161 = 77991^2 + 27619^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6845405195 and 6845405204.

It is not an unprimeable number, because it can be changed into a prime (6845405243) 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, 131642383 + ... + 131642434.

Almost surely, 2^6845405242 is an apocalyptic number.

6845405242 is a deficient number, since it is larger than the sum of its proper divisors (4212557114).

6845405242 is a wasteful number, since it uses less digits than its factorization.

6845405242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263284832.

The product of its (nonzero) digits is 307200, while the sum is 40.

The square root of 6845405242 is about 82736.9641816764. The cubic root of 6845405242 is about 1898.7438827653.

The spelling of 6845405242 in words is "six billion, eight hundred forty-five million, four hundred five thousand, two hundred forty-two".