180612474623981 has 2 divisors, whose sum is σ = 180612474623982. Its totient is φ = 180612474623980.

The previous prime is 180612474623951. The next prime is 180612474624047. The reversal of 180612474623981 is 189326474216081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123777974058025 + 56834500565956 = 11125555^2 + 7538866^2 .

It is a cyclic number.

It is not a de Polignac number, because 180612474623981 - 2²⁶ = 180612407515117 is a prime.

It is a super-2 number, since 2×180612474623981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180612474623951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90306237311990 + 90306237311991.

It is an arithmetic number, because the mean of its divisors is an integer number (90306237311991).

Almost surely, 2^{180612474623981} is an apocalyptic number.

It is an amenable number.

180612474623981 is a deficient number, since it is larger than the sum of its proper divisors (1).

180612474623981 is an equidigital number, since it uses as much as digits as its factorization.

180612474623981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 180612474623981 in words is "one hundred eighty trillion, six hundred twelve billion, four hundred seventy-four million, six hundred twenty-three thousand, nine hundred eighty-one".