16278911149 has 2 divisors, whose sum is σ = 16278911150. Its totient is φ = 16278911148.

The previous prime is 16278911071. The next prime is 16278911171. The reversal of 16278911149 is 94111987261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15586274025 + 692637124 = 124845^2 + 26318^2 .

It is a cyclic number.

It is not a de Polignac number, because 16278911149 - 2⁷ = 16278911021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16278911249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8139455574 + 8139455575.

It is an arithmetic number, because the mean of its divisors is an integer number (8139455575).

Almost surely, 2^16278911149 is an apocalyptic number.

It is an amenable number.

16278911149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16278911149 is an equidigital number, since it uses as much as digits as its factorization.

16278911149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 49.

The spelling of 16278911149 in words is "sixteen billion, two hundred seventy-eight million, nine hundred eleven thousand, one hundred forty-nine".