6751105945021 has 4 divisors (see below), whose sum is σ = 6751111178812. Its totient is φ = 6751100711232.

The previous prime is 6751105945007. The next prime is 6751105945063. The reversal of 6751105945021 is 1205495011576.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3103636217796 + 3647469727225 = 1761714^2 + 1909835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6751105945021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6751105955021) 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, 841195 + ... + 3769591.

It is an arithmetic number, because the mean of its divisors is an integer number (1687777794703).

Almost surely, 2^{6751105945021} is an apocalyptic number.

It is an amenable number.

6751105945021 is a deficient number, since it is larger than the sum of its proper divisors (5233791).

6751105945021 is a wasteful number, since it uses less digits than its factorization.

6751105945021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233790.

The product of its (nonzero) digits is 378000, while the sum is 46.

The spelling of 6751105945021 in words is "six trillion, seven hundred fifty-one billion, one hundred five million, nine hundred forty-five thousand, twenty-one".