3161486721 has 8 divisors (see below), whose sum is σ = 4313346400. Its totient is φ = 2058642432.

The previous prime is 3161486717. The next prime is 3161486743. The reversal of 3161486721 is 1276841613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3161486721 - 2² = 3161486717 is a prime.

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 3161486721.

It is not an unprimeable number, because it can be changed into a prime (3161486761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12253696 + ... + 12253953.

It is an arithmetic number, because the mean of its divisors is an integer number (539168300).

Almost surely, 2^3161486721 is an apocalyptic number.

It is an amenable number.

3161486721 is a deficient number, since it is larger than the sum of its proper divisors (1151859679).

3161486721 is a wasteful number, since it uses less digits than its factorization.

3161486721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24507695.

The product of its digits is 48384, while the sum is 39.

The square root of 3161486721 is about 56227.0995250511. The cubic root of 3161486721 is about 1467.6768836043.

The spelling of 3161486721 in words is "three billion, one hundred sixty-one million, four hundred eighty-six thousand, seven hundred twenty-one".