3121661263 has 16 divisors (see below), whose sum is σ = 3594035200. Its totient is φ = 2655965376.

The previous prime is 3121661243. The next prime is 3121661293. The reversal of 3121661263 is 3621661213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121661263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121661243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570163 + ... + 575611.

It is an arithmetic number, because the mean of its divisors is an integer number (224627200).

Almost surely, 2^3121661263 is an apocalyptic number.

3121661263 is a deficient number, since it is larger than the sum of its proper divisors (472373937).

3121661263 is a wasteful number, since it uses less digits than its factorization.

3121661263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046.

The product of its digits is 7776, while the sum is 31.

The square root of 3121661263 is about 55871.8288854052. The cubic root of 3121661263 is about 1461.4880155052.

The spelling of 3121661263 in words is "three billion, one hundred twenty-one million, six hundred sixty-one thousand, two hundred sixty-three".