6943561840 has 40 divisors (see below), whose sum is σ = 16211373120. Its totient is φ = 2765796096.

The previous prime is 6943561789. The next prime is 6943561883. The reversal of 6943561840 is 481653496.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162459 + ... + 200698.

It is an arithmetic number, because the mean of its divisors is an integer number (405284328).

Almost surely, 2^6943561840 is an apocalyptic number.

It is an amenable number.

6943561840 is an abundant number, since it is smaller than the sum of its proper divisors (9267811280).

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

6943561840 is a wasteful number, since it uses less digits than its factorization.

6943561840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363409 (or 363403 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 6943561840 is about 83328.0375383940. The cubic root of 6943561840 is about 1907.7762411075.

The spelling of 6943561840 in words is "six billion, nine hundred forty-three million, five hundred sixty-one thousand, eight hundred forty".