16555005541 has 2 divisors, whose sum is σ = 16555005542. Its totient is φ = 16555005540.

The previous prime is 16555005491. The next prime is 16555005563. The reversal of 16555005541 is 14550055561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13984008516 + 2570997025 = 118254^2 + 50705^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555005541 - 2²¹ = 16552908389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16555005541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16555006541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277502770 + 8277502771.

It is an arithmetic number, because the mean of its divisors is an integer number (8277502771).

Almost surely, 2^16555005541 is an apocalyptic number.

It is an amenable number.

16555005541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555005541 is an equidigital number, since it uses as much as digits as its factorization.

16555005541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 16555005541 in words is "sixteen billion, five hundred fifty-five million, five thousand, five hundred forty-one".