16555455493 has 2 divisors, whose sum is σ = 16555455494. Its totient is φ = 16555455492.

The previous prime is 16555455487. The next prime is 16555455509. The reversal of 16555455493 is 39455455561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8620565409 + 7934890084 = 92847^2 + 89078^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555455493 - 2⁵ = 16555455461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16555455493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16555455463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277727746 + 8277727747.

It is an arithmetic number, because the mean of its divisors is an integer number (8277727747).

Almost surely, 2^16555455493 is an apocalyptic number.

It is an amenable number.

16555455493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555455493 is an equidigital number, since it uses as much as digits as its factorization.

16555455493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100000, while the sum is 52.

The spelling of 16555455493 in words is "sixteen billion, five hundred fifty-five million, four hundred fifty-five thousand, four hundred ninety-three".