3181945456 has 20 divisors (see below), whose sum is σ = 6222639672. Its totient is φ = 1576102976.

The previous prime is 3181945439. The next prime is 3181945457. The reversal of 3181945456 is 6545491813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3181945457) 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, 927595 + ... + 931018.

Almost surely, 2^3181945456 is an apocalyptic number.

It is an amenable number.

3181945456 is a deficient number, since it is larger than the sum of its proper divisors (3040694216).

3181945456 is a wasteful number, since it uses less digits than its factorization.

3181945456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858728 (or 1858722 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The square root of 3181945456 is about 56408.7356355379. The cubic root of 3181945456 is about 1470.8359747436.

The spelling of 3181945456 in words is "three billion, one hundred eighty-one million, nine hundred forty-five thousand, four hundred fifty-six".