179480774981 has 2 divisors, whose sum is σ = 179480774982. Its totient is φ = 179480774980.

The previous prime is 179480774959. The next prime is 179480775017. The reversal of 179480774981 is 189477084971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106034896900 + 73445878081 = 325630^2 + 271009^2 .

It is an emirp because it is prime and its reverse (189477084971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 179480774981 - 2⁶ = 179480774917 is a prime.

It is a super-2 number, since 2×179480774981² (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 (179480774281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89740387490 + 89740387491.

It is an arithmetic number, because the mean of its divisors is an integer number (89740387491).

Almost surely, 2^179480774981 is an apocalyptic number.

It is an amenable number.

179480774981 is a deficient number, since it is larger than the sum of its proper divisors (1).

179480774981 is an equidigital number, since it uses as much as digits as its factorization.

179480774981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 65.

The spelling of 179480774981 in words is "one hundred seventy-nine billion, four hundred eighty million, seven hundred seventy-four thousand, nine hundred eighty-one".