16043776473889 has 2 divisors, whose sum is σ = 16043776473890. Its totient is φ = 16043776473888.

The previous prime is 16043776473853. The next prime is 16043776473931. The reversal of 16043776473889 is 98837467734061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16041947457600 + 1829016289 = 4005240^2 + 42767^2 .

It is a cyclic number.

It is not a de Polignac number, because 16043776473889 - 2¹⁷ = 16043776342817 is a prime.

It is a super-2 number, since 2×16043776473889² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16043776473589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021888236944 + 8021888236945.

It is an arithmetic number, because the mean of its divisors is an integer number (8021888236945).

Almost surely, 2^{16043776473889} is an apocalyptic number.

It is an amenable number.

16043776473889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16043776473889 is an equidigital number, since it uses as much as digits as its factorization.

16043776473889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024192512, while the sum is 73.

The spelling of 16043776473889 in words is "sixteen trillion, forty-three billion, seven hundred seventy-six million, four hundred seventy-three thousand, eight hundred eighty-nine".