180746737081 has 2 divisors, whose sum is σ = 180746737082. Its totient is φ = 180746737080.

The previous prime is 180746736913. The next prime is 180746737133. The reversal of 180746737081 is 180737647081.

It is a happy number.

It is an a-pointer prime, because the next prime (180746737133) can be obtained adding 180746737081 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179678493225 + 1068243856 = 423885^2 + 32684^2 .

It is an emirp because it is prime and its reverse (180737647081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180746737081 - 2¹¹ = 180746735033 is a prime.

It is a super-2 number, since 2×180746737081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (180746737681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90373368540 + 90373368541.

It is an arithmetic number, because the mean of its divisors is an integer number (90373368541).

Almost surely, 2^180746737081 is an apocalyptic number.

It is an amenable number.

180746737081 is a deficient number, since it is larger than the sum of its proper divisors (1).

180746737081 is an equidigital number, since it uses as much as digits as its factorization.

180746737081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 180746737081 in words is "one hundred eighty billion, seven hundred forty-six million, seven hundred thirty-seven thousand, eighty-one".