6781868929 has 16 divisors (see below), whose sum is σ = 7592904000. Its totient is φ = 6005171520.

The previous prime is 6781868927. The next prime is 6781868957. The reversal of 6781868929 is 9298681876.

It is a cyclic number.

It is not a de Polignac number, because 6781868929 - 2¹ = 6781868927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6781868927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22807 + ... + 118675.

It is an arithmetic number, because the mean of its divisors is an integer number (474556500).

Almost surely, 2^6781868929 is an apocalyptic number.

It is an amenable number.

6781868929 is a deficient number, since it is larger than the sum of its proper divisors (811035071).

6781868929 is a wasteful number, since it uses less digits than its factorization.

6781868929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96048.

The product of its digits is 20901888, while the sum is 64.

The square root of 6781868929 is about 82352.1033671879. The cubic root of 6781868929 is about 1892.8511532868.

The spelling of 6781868929 in words is "six billion, seven hundred eighty-one million, eight hundred sixty-eight thousand, nine hundred twenty-nine".