163420959547 has 2 divisors, whose sum is σ = 163420959548. Its totient is φ = 163420959546.

The previous prime is 163420959497. The next prime is 163420959577. The reversal of 163420959547 is 745959024361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163420959547 - 2¹⁹ = 163420435259 is a prime.

It is not a weakly prime, because it can be changed into another prime (163420959577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81710479773 + 81710479774.

It is an arithmetic number, because the mean of its divisors is an integer number (81710479774).

Almost surely, 2^163420959547 is an apocalyptic number.

163420959547 is a deficient number, since it is larger than the sum of its proper divisors (1).

163420959547 is an equidigital number, since it uses as much as digits as its factorization.

163420959547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 163420959547 in words is "one hundred sixty-three billion, four hundred twenty million, nine hundred fifty-nine thousand, five hundred forty-seven".