180985619077 has 2 divisors, whose sum is σ = 180985619078. Its totient is φ = 180985619076.

The previous prime is 180985619063. The next prime is 180985619083. The reversal of 180985619077 is 770916589081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156713848641 + 24271770436 = 395871^2 + 155794^2 .

It is an emirp because it is prime and its reverse (770916589081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180985619077 - 2¹⁹ = 180985094789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180985619027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90492809538 + 90492809539.

It is an arithmetic number, because the mean of its divisors is an integer number (90492809539).

Almost surely, 2^180985619077 is an apocalyptic number.

It is an amenable number.

180985619077 is a deficient number, since it is larger than the sum of its proper divisors (1).

180985619077 is an equidigital number, since it uses as much as digits as its factorization.

180985619077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 61.

The spelling of 180985619077 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred nineteen thousand, seventy-seven".