3123744778643 has 16 divisors (see below), whose sum is σ = 3202695820800. Its totient is φ = 3045810297600.

The previous prime is 3123744778621. The next prime is 3123744778729. The reversal of 3123744778643 is 3468774473213.

It is a cyclic number.

It is not a de Polignac number, because 3123744778643 - 2³⁸ = 2848866871699 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3123744774643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9472808 + ... + 9797018.

It is an arithmetic number, because the mean of its divisors is an integer number (200168488800).

Almost surely, 2^{3123744778643} is an apocalyptic number.

3123744778643 is a deficient number, since it is larger than the sum of its proper divisors (78951042157).

3123744778643 is a wasteful number, since it uses less digits than its factorization.

3123744778643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325778.

The product of its digits is 56899584, while the sum is 59.

The spelling of 3123744778643 in words is "three trillion, one hundred twenty-three billion, seven hundred forty-four million, seven hundred seventy-eight thousand, six hundred forty-three".