6845397280 has 24 divisors (see below), whose sum is σ = 16172251452. Its totient is φ = 2738158848.

The previous prime is 6845397257. The next prime is 6845397283. The reversal of 6845397280 is 827935486.

It can be written as a sum of positive squares in 2 ways, for example, as 6450659856 + 394737424 = 80316^2 + 19868^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6845397283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21391707 + ... + 21392026.

Almost surely, 2^6845397280 is an apocalyptic number.

It is an amenable number.

6845397280 is an abundant number, since it is smaller than the sum of its proper divisors (9326854172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6845397280 is a wasteful number, since it uses less digits than its factorization.

6845397280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42783748 (or 42783740 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The square root of 6845397280 is about 82736.9160653212. The cubic root of 6845397280 is about 1898.7431466119.

The spelling of 6845397280 in words is "six billion, eight hundred forty-five million, three hundred ninety-seven thousand, two hundred eighty".