180696821827 has 2 divisors, whose sum is σ = 180696821828. Its totient is φ = 180696821826.

The previous prime is 180696821749. The next prime is 180696821849. The reversal of 180696821827 is 728128696081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 180696821827 - 2¹⁹ = 180696297539 is a prime.

It is not a weakly prime, because it can be changed into another prime (180696821927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90348410913 + 90348410914.

It is an arithmetic number, because the mean of its divisors is an integer number (90348410914).

Almost surely, 2^180696821827 is an apocalyptic number.

180696821827 is a deficient number, since it is larger than the sum of its proper divisors (1).

180696821827 is an equidigital number, since it uses as much as digits as its factorization.

180696821827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 180696821827 in words is "one hundred eighty billion, six hundred ninety-six million, eight hundred twenty-one thousand, eight hundred twenty-seven".