179949469373857 has 2 divisors, whose sum is σ = 179949469373858. Its totient is φ = 179949469373856.

The previous prime is 179949469373819. The next prime is 179949469373881. The reversal of 179949469373857 is 758373964949971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179330692056481 + 618777317376 = 13391441^2 + 786624^2 .

It is an emirp because it is prime and its reverse (758373964949971) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-179949469373857 is a prime.

It is not a weakly prime, because it can be changed into another prime (179949469373897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89974734686928 + 89974734686929.

It is an arithmetic number, because the mean of its divisors is an integer number (89974734686929).

Almost surely, 2^{179949469373857} is an apocalyptic number.

It is an amenable number.

179949469373857 is a deficient number, since it is larger than the sum of its proper divisors (1).

179949469373857 is an equidigital number, since it uses as much as digits as its factorization.

179949469373857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77774618880, while the sum is 91.

The spelling of 179949469373857 in words is "one hundred seventy-nine trillion, nine hundred forty-nine billion, four hundred sixty-nine million, three hundred seventy-three thousand, eight hundred fifty-seven".