180663105218731 has 2 divisors, whose sum is σ = 180663105218732. Its totient is φ = 180663105218730.

The previous prime is 180663105218711. The next prime is 180663105218789. The reversal of 180663105218731 is 137812501366081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180663105218731 is a prime.

It is a super-2 number, since 2×180663105218731² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (180663105218711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90331552609365 + 90331552609366.

It is an arithmetic number, because the mean of its divisors is an integer number (90331552609366).

Almost surely, 2^{180663105218731} is an apocalyptic number.

180663105218731 is a deficient number, since it is larger than the sum of its proper divisors (1).

180663105218731 is an equidigital number, since it uses as much as digits as its factorization.

180663105218731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 180663105218731 in words is "one hundred eighty trillion, six hundred sixty-three billion, one hundred five million, two hundred eighteen thousand, seven hundred thirty-one".