128163081623 has 2 divisors, whose sum is σ = 128163081624. Its totient is φ = 128163081622.

The previous prime is 128163081587. The next prime is 128163081643. The reversal of 128163081623 is 326180361821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128163081623 is a prime.

It is a super-2 number, since 2×128163081623² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128163081643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64081540811 + 64081540812.

It is an arithmetic number, because the mean of its divisors is an integer number (64081540812).

Almost surely, 2^128163081623 is an apocalyptic number.

128163081623 is a deficient number, since it is larger than the sum of its proper divisors (1).

128163081623 is an equidigital number, since it uses as much as digits as its factorization.

128163081623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 128163081623 in words is "one hundred twenty-eight billion, one hundred sixty-three million, eighty-one thousand, six hundred twenty-three".