3111661172 has 24 divisors (see below), whose sum is σ = 5474510496. Its totient is φ = 1547536928.

The previous prime is 3111661171. The next prime is 3111661199. The reversal of 3111661172 is 2711661113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111661171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685703 + ... + 690225.

It is an arithmetic number, because the mean of its divisors is an integer number (228104604).

Almost surely, 2^3111661172 is an apocalyptic number.

It is an amenable number.

3111661172 is a deficient number, since it is larger than the sum of its proper divisors (2362849324).

3111661172 is a wasteful number, since it uses less digits than its factorization.

3111661172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407 (or 5405 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 3111661172 is about 55782.2657481748. The cubic root of 3111661172 is about 1459.9257440185.

The spelling of 3111661172 in words is "three billion, one hundred eleven million, six hundred sixty-one thousand, one hundred seventy-two".