16442615666413 has 2 divisors, whose sum is σ = 16442615666414. Its totient is φ = 16442615666412.

The previous prime is 16442615666401. The next prime is 16442615666419. The reversal of 16442615666413 is 31466651624461.

16442615666413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15378774010084 + 1063841656329 = 3921578^2 + 1031427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442615666413 is a prime.

It is a super-3 number, since 3×16442615666413³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16442615666419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221307833206 + 8221307833207.

It is an arithmetic number, because the mean of its divisors is an integer number (8221307833207).

Almost surely, 2^{16442615666413} is an apocalyptic number.

It is an amenable number.

16442615666413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442615666413 is an equidigital number, since it uses as much as digits as its factorization.

16442615666413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 55.

The spelling of 16442615666413 in words is "sixteen trillion, four hundred forty-two billion, six hundred fifteen million, six hundred sixty-six thousand, four hundred thirteen".