16216571542387 has 2 divisors, whose sum is σ = 16216571542388. Its totient is φ = 16216571542386.

The previous prime is 16216571542373. The next prime is 16216571542397. The reversal of 16216571542387 is 78324517561261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16216571542387 - 2²³ = 16216563153779 is a prime.

It is not a weakly prime, because it can be changed into another prime (16216571542397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108285771193 + 8108285771194.

It is an arithmetic number, because the mean of its divisors is an integer number (8108285771194).

Almost surely, 2^{16216571542387} is an apocalyptic number.

16216571542387 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216571542387 is an equidigital number, since it uses as much as digits as its factorization.

16216571542387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 58.

The spelling of 16216571542387 in words is "sixteen trillion, two hundred sixteen billion, five hundred seventy-one million, five hundred forty-two thousand, three hundred eighty-seven".