180042971623 has 2 divisors, whose sum is σ = 180042971624. Its totient is φ = 180042971622.

The previous prime is 180042971609. The next prime is 180042971651. The reversal of 180042971623 is 326179240081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180042971623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180042971623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180042971723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90021485811 + 90021485812.

It is an arithmetic number, because the mean of its divisors is an integer number (90021485812).

Almost surely, 2^180042971623 is an apocalyptic number.

180042971623 is a deficient number, since it is larger than the sum of its proper divisors (1).

180042971623 is an equidigital number, since it uses as much as digits as its factorization.

180042971623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 180042971623 in words is "one hundred eighty billion, forty-two million, nine hundred seventy-one thousand, six hundred twenty-three".