3117972356209 has 8 divisors (see below), whose sum is σ = 3194862704712. Its totient is φ = 3041122114560.

The previous prime is 3117972356207. The next prime is 3117972356231. The reversal of 3117972356209 is 9026532797113.

It can be written as a sum of positive squares in 4 ways, for example, as 430471146609 + 2687501209600 = 656103^2 + 1639360^2 .

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 3117972356209 - 2¹ = 3117972356207 is a prime.

It is a super-2 number, since 2×3117972356209² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3117972356209.

It is not an unprimeable number, because it can be changed into a prime (3117972356207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9869284 + ... + 10180309.

It is an arithmetic number, because the mean of its divisors is an integer number (399357838089).

Almost surely, 2^{3117972356209} is an apocalyptic number.

It is an amenable number.

3117972356209 is a deficient number, since it is larger than the sum of its proper divisors (76890348503).

3117972356209 is a wasteful number, since it uses less digits than its factorization.

3117972356209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053427.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 3117972356209 in words is "three trillion, one hundred seventeen billion, nine hundred seventy-two million, three hundred fifty-six thousand, two hundred nine".