16442615665387 has 2 divisors, whose sum is σ = 16442615665388. Its totient is φ = 16442615665386.

The previous prime is 16442615665321. The next prime is 16442615665397. The reversal of 16442615665387 is 78356651624461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16442615665387 - 2²³ = 16442607276779 is a prime.

It is a super-3 number, since 3×16442615665387³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16442615665397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221307832693 + 8221307832694.

It is an arithmetic number, because the mean of its divisors is an integer number (8221307832694).

Almost surely, 2^{16442615665387} is an apocalyptic number.

16442615665387 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442615665387 is an equidigital number, since it uses as much as digits as its factorization.

16442615665387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 64.

The spelling of 16442615665387 in words is "sixteen trillion, four hundred forty-two billion, six hundred fifteen million, six hundred sixty-five thousand, three hundred eighty-seven".