6787672273981 has 4 divisors (see below), whose sum is σ = 6790416988252. Its totient is φ = 6784927559712.

The previous prime is 6787672273969. The next prime is 6787672273997. The reversal of 6787672273981 is 1893722767876.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4990018807225 + 1797653466756 = 2233835^2 + 1340766^2 .

It is a cyclic number.

It is not a de Polignac number, because 6787672273981 - 2²⁵ = 6787638719549 is a prime.

It is a super-2 number, since 2×6787672273981² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6787672243981) 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, 1372353426 + ... + 1372358371.

It is an arithmetic number, because the mean of its divisors is an integer number (1697604247063).

Almost surely, 2^{6787672273981} is an apocalyptic number.

It is an amenable number.

6787672273981 is a deficient number, since it is larger than the sum of its proper divisors (2744714271).

6787672273981 is a wasteful number, since it uses less digits than its factorization.

6787672273981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744714270.

The product of its digits is 597445632, while the sum is 73.

The spelling of 6787672273981 in words is "six trillion, seven hundred eighty-seven billion, six hundred seventy-two million, two hundred seventy-three thousand, nine hundred eighty-one".