3117520645 has 8 divisors (see below), whose sum is σ = 3747744504. Its totient is φ = 2489536704.

The previous prime is 3117520643. The next prime is 3117520687. The reversal of 3117520645 is 5460257113.

3117520645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 310852161 + 2806668484 = 17631^2 + 52978^2 .

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 3117520645 - 2¹ = 3117520643 is a prime.

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 3117520645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3117520643) 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, 556914 + ... + 562483.

It is an arithmetic number, because the mean of its divisors is an integer number (468468063).

Almost surely, 2^3117520645 is an apocalyptic number.

It is an amenable number.

3117520645 is a deficient number, since it is larger than the sum of its proper divisors (630223859).

3117520645 is a wasteful number, since it uses less digits than its factorization.

3117520645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119959.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 3117520645 is about 55834.7619767471. The cubic root of 3117520645 is about 1460.8415497688.

Adding to 3117520645 its reverse (5460257113), we get a palindrome (8577777758).

The spelling of 3117520645 in words is "three billion, one hundred seventeen million, five hundred twenty thousand, six hundred forty-five".