3121645144 has 16 divisors (see below), whose sum is σ = 6054915600. Its totient is φ = 1507000992.

The previous prime is 3121645117. The next prime is 3121645183. The reversal of 3121645144 is 4415461213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6727452 + ... + 6727915.

It is an arithmetic number, because the mean of its divisors is an integer number (378432225).

Almost surely, 2^3121645144 is an apocalyptic number.

It is an amenable number.

3121645144 is a deficient number, since it is larger than the sum of its proper divisors (2933270456).

3121645144 is a wasteful number, since it uses less digits than its factorization.

3121645144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13455402 (or 13455398 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 3121645144 is about 55871.6846354215. The cubic root of 3121645144 is about 1461.4854999892.

The spelling of 3121645144 in words is "three billion, one hundred twenty-one million, six hundred forty-five thousand, one hundred forty-four".