6787128745 has 8 divisors (see below), whose sum is σ = 8154455616. Its totient is φ = 5423102256.

The previous prime is 6787128727. The next prime is 6787128787. The reversal of 6787128745 is 5478217876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6787128745 - 2⁵ = 6787128713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820567 + ... + 828796.

It is an arithmetic number, because the mean of its divisors is an integer number (1019306952).

Almost surely, 2^6787128745 is an apocalyptic number.

It is an amenable number.

6787128745 is a deficient number, since it is larger than the sum of its proper divisors (1367326871).

6787128745 is a wasteful number, since it uses less digits than its factorization.

6787128745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650191.

The product of its digits is 5268480, while the sum is 55.

The square root of 6787128745 is about 82384.0320996733. The cubic root of 6787128745 is about 1893.3403732016.

The spelling of 6787128745 in words is "six billion, seven hundred eighty-seven million, one hundred twenty-eight thousand, seven hundred forty-five".