1620143365187 has 2 divisors, whose sum is σ = 1620143365188. Its totient is φ = 1620143365186.

The previous prime is 1620143365121. The next prime is 1620143365207. The reversal of 1620143365187 is 7815633410261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620143365187 - 2¹⁶ = 1620143299651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620143365787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810071682593 + 810071682594.

It is an arithmetic number, because the mean of its divisors is an integer number (810071682594).

Almost surely, 2^{1620143365187} is an apocalyptic number.

1620143365187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620143365187 is an equidigital number, since it uses as much as digits as its factorization.

1620143365187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 1620143365187 in words is "one trillion, six hundred twenty billion, one hundred forty-three million, three hundred sixty-five thousand, one hundred eighty-seven".