180381756312497 has 2 divisors, whose sum is σ = 180381756312498. Its totient is φ = 180381756312496.

The previous prime is 180381756312493. The next prime is 180381756312523. The reversal of 180381756312497 is 794213657183081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133015647964081 + 47366108348416 = 11533241^2 + 6882304^2 .

It is a cyclic number.

It is not a de Polignac number, because 180381756312497 - 2² = 180381756312493 is a prime.

It is not a weakly prime, because it can be changed into another prime (180381756312493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90190878156248 + 90190878156249.

It is an arithmetic number, because the mean of its divisors is an integer number (90190878156249).

It is a 1-persistent number, because it is pandigital, but 2⋅180381756312497 = 360763512624994 is not.

Almost surely, 2^{180381756312497} is an apocalyptic number.

It is an amenable number.

180381756312497 is a deficient number, since it is larger than the sum of its proper divisors (1).

180381756312497 is an equidigital number, since it uses as much as digits as its factorization.

180381756312497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 180381756312497 in words is "one hundred eighty trillion, three hundred eighty-one billion, seven hundred fifty-six million, three hundred twelve thousand, four hundred ninety-seven".