216181831058077 has 2 divisors, whose sum is σ = 216181831058078. Its totient is φ = 216181831058076.

The previous prime is 216181831058071. The next prime is 216181831058117. The reversal of 216181831058077 is 770850138181612.

It is a happy number.

216181831058077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204412615722436 + 11769215335641 = 14297294^2 + 3430629^2 .

It is a cyclic number.

It is not a de Polignac number, because 216181831058077 - 2²³ = 216181822669469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216181831058071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108090915529038 + 108090915529039.

It is an arithmetic number, because the mean of its divisors is an integer number (108090915529039).

Almost surely, 2^{216181831058077} is an apocalyptic number.

It is an amenable number.

216181831058077 is a deficient number, since it is larger than the sum of its proper divisors (1).

216181831058077 is an equidigital number, since it uses as much as digits as its factorization.

216181831058077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 58.

The spelling of 216181831058077 in words is "two hundred sixteen trillion, one hundred eighty-one billion, eight hundred thirty-one million, fifty-eight thousand, seventy-seven".