16554474740729 has 2 divisors, whose sum is σ = 16554474740730. Its totient is φ = 16554474740728.

The previous prime is 16554474740669. The next prime is 16554474740747. The reversal of 16554474740729 is 92704747445561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9531100213504 + 7023374527225 = 3087248^2 + 2650165^2 .

It is a cyclic number.

It is not a de Polignac number, because 16554474740729 - 2²⁴ = 16554457963513 is a prime.

It is not a weakly prime, because it can be changed into another prime (16554474740129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277237370364 + 8277237370365.

It is an arithmetic number, because the mean of its divisors is an integer number (8277237370365).

Almost surely, 2^{16554474740729} is an apocalyptic number.

It is an amenable number.

16554474740729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16554474740729 is an equidigital number, since it uses as much as digits as its factorization.

16554474740729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 237081600, while the sum is 65.

The spelling of 16554474740729 in words is "sixteen trillion, five hundred fifty-four billion, four hundred seventy-four million, seven hundred forty thousand, seven hundred twenty-nine".