6840172356 has 12 divisors (see below), whose sum is σ = 15960402192. Its totient is φ = 2280057448.

The previous prime is 6840172333. The next prime is 6840172357. The reversal of 6840172356 is 6532710486.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (6840172357) 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 3 ways as a sum of consecutive naturals, for example, 285007170 + ... + 285007193.

It is an arithmetic number, because the mean of its divisors is an integer number (1330033516).

Almost surely, 2^6840172356 is an apocalyptic number.

It is an amenable number.

6840172356 is an abundant number, since it is smaller than the sum of its proper divisors (9120229836).

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

6840172356 is a wasteful number, since it uses less digits than its factorization.

6840172356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570014370 (or 570014368 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 6840172356 is about 82705.3345075153. The cubic root of 6840172356 is about 1898.2599356114.

The spelling of 6840172356 in words is "six billion, eight hundred forty million, one hundred seventy-two thousand, three hundred fifty-six".