6920861347009 has 27 divisors (see below), whose sum is σ = 7224782908707. Its totient is φ = 6629497560000.

The previous prime is 6920861346989. The next prime is 6920861347039. The reversal of 6920861347009 is 9007431680296.

The square root of 6920861347009 is 2630753.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 121951116225 + 6798910230784 = 349215^2 + 2607472^2 .

It is not a de Polignac number, because 6920861347009 - 2⁵ = 6920861346977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6920861347039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9215527384 + ... + 9215528134.

Almost surely, 2^{6920861347009} is an apocalyptic number.

6920861347009 is the 2630753-rd square number.

6920861347009 is the 1315377-th centered octagonal number.

It is an amenable number.

6920861347009 is a deficient number, since it is larger than the sum of its proper divisors (303921561698).

6920861347009 is an frugal number, since it uses more digits than its factorization.

6920861347009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 6920861347009 in words is "six trillion, nine hundred twenty billion, eight hundred sixty-one million, three hundred forty-seven thousand, nine".