21163146523559 has 2 divisors, whose sum is σ = 21163146523560. Its totient is φ = 21163146523558.

The previous prime is 21163146523531. The next prime is 21163146523633. The reversal of 21163146523559 is 95532564136112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21163146523559 - 2²⁰ = 21163145474983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21163146523559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21163146523459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581573261779 + 10581573261780.

It is an arithmetic number, because the mean of its divisors is an integer number (10581573261780).

Almost surely, 2^{21163146523559} is an apocalyptic number.

21163146523559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21163146523559 is an equidigital number, since it uses as much as digits as its factorization.

21163146523559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 53.

The spelling of 21163146523559 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred forty-six million, five hundred twenty-three thousand, five hundred fifty-nine".