3123393665728 has 84 divisors (see below), whose sum is σ = 7328095642992. Its totient is φ = 1316652986880.

The previous prime is 3123393665701. The next prime is 3123393665779. The reversal of 3123393665728 is 8275663933213.

It is a super-2 number, since 2×3123393665728² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7972476 + ... + 8355067.

Almost surely, 2^{3123393665728} is an apocalyptic number.

It is an amenable number.

3123393665728 is an abundant number, since it is smaller than the sum of its proper divisors (4204701977264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3123393665728 is a wasteful number, since it uses less digits than its factorization.

3123393665728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16327630 (or 16327613 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 58.

The spelling of 3123393665728 in words is "three trillion, one hundred twenty-three billion, three hundred ninety-three million, six hundred sixty-five thousand, seven hundred twenty-eight".