3261116545 has 16 divisors (see below), whose sum is σ = 4255527888. Its totient is φ = 2389063680.

The previous prime is 3261116539. The next prime is 3261116569. The reversal of 3261116545 is 5456111623.

It can be written as a sum of positive squares in 8 ways, for example, as 848440384 + 2412676161 = 29128^2 + 49119^2 .

It is not a de Polignac number, because 3261116545 - 2⁵ = 3261116513 is a prime.

It is a super-2 number, since 2×3261116545² = 21269762240145474050, which 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 3261116545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515316 + ... + 521605.

It is an arithmetic number, because the mean of its divisors is an integer number (265970493).

Almost surely, 2^3261116545 is an apocalyptic number.

It is an amenable number.

3261116545 is a deficient number, since it is larger than the sum of its proper divisors (994411343).

3261116545 is a wasteful number, since it uses less digits than its factorization.

3261116545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036980.

The product of its digits is 21600, while the sum is 34.

The square root of 3261116545 is about 57106.1865737855. The cubic root of 3261116545 is about 1482.9349697691.

The spelling of 3261116545 in words is "three billion, two hundred sixty-one million, one hundred sixteen thousand, five hundred forty-five".