5311261161 has 12 divisors (see below), whose sum is σ = 7672466880. Its totient is φ = 3540543000.

The previous prime is 5311261133. The next prime is 5311261187. The reversal of 5311261161 is 1611621135.

5311261161 is a `hidden beast` number, since 5 + 31 + 12 + 611 + 6 + 1 = 666.

It is not a de Polignac number, because 5311261161 - 2⁶ = 5311261097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5311261061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162820 + ... + 192698.

It is an arithmetic number, because the mean of its divisors is an integer number (639372240).

Almost surely, 2^5311261161 is an apocalyptic number.

It is an amenable number.

5311261161 is a deficient number, since it is larger than the sum of its proper divisors (2361205719).

5311261161 is a wasteful number, since it uses less digits than its factorization.

5311261161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49636 (or 49633 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 5311261161 is about 72878.3998246394. The cubic root of 5311261161 is about 1744.7473695517.

Adding to 5311261161 its reverse (1611621135), we get a palindrome (6922882296).

The spelling of 5311261161 in words is "five billion, three hundred eleven million, two hundred sixty-one thousand, one hundred sixty-one".