6781413556 has 24 divisors (see below), whose sum is σ = 12535195904. Its totient is φ = 3205016640.

The previous prime is 6781413533. The next prime is 6781413559. The reversal of 6781413556 is 6553141876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781413559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630585 + ... + 641248.

Almost surely, 2^6781413556 is an apocalyptic number.

It is an amenable number.

6781413556 is a deficient number, since it is larger than the sum of its proper divisors (5753782348).

6781413556 is a wasteful number, since it uses less digits than its factorization.

6781413556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271911 (or 1271909 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 6781413556 is about 82349.3385280052. The cubic root of 6781413556 is about 1892.8087867646.

The spelling of 6781413556 in words is "six billion, seven hundred eighty-one million, four hundred thirteen thousand, five hundred fifty-six".