2923819566721 has 2 divisors, whose sum is σ = 2923819566722. Its totient is φ = 2923819566720.

The previous prime is 2923819566713. The next prime is 2923819566739. The reversal of 2923819566721 is 1276659183292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2889728006400 + 34091560321 = 1699920^2 + 184639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2923819566721 - 2³ = 2923819566713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2923819566721.

It is not a weakly prime, because it can be changed into another prime (2923819566781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1461909783360 + 1461909783361.

It is an arithmetic number, because the mean of its divisors is an integer number (1461909783361).

Almost surely, 2^{2923819566721} is an apocalyptic number.

It is an amenable number.

2923819566721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2923819566721 is an equidigital number, since it uses as much as digits as its factorization.

2923819566721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 61.

The spelling of 2923819566721 in words is "two trillion, nine hundred twenty-three billion, eight hundred nineteen million, five hundred sixty-six thousand, seven hundred twenty-one".