236489894161 has 2 divisors, whose sum is σ = 236489894162. Its totient is φ = 236489894160.

The previous prime is 236489894141. The next prime is 236489894167. The reversal of 236489894161 is 161498984632.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232193878225 + 4296015936 = 481865^2 + 65544^2 .

It is a cyclic number.

It is not a de Polignac number, because 236489894161 - 2⁹ = 236489893649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 236489894161.

It is not a weakly prime, because it can be changed into another prime (236489894167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118244947080 + 118244947081.

It is an arithmetic number, because the mean of its divisors is an integer number (118244947081).

Almost surely, 2^236489894161 is an apocalyptic number.

It is an amenable number.

236489894161 is a deficient number, since it is larger than the sum of its proper divisors (1).

236489894161 is an equidigital number, since it uses as much as digits as its factorization.

236489894161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 61.

The spelling of 236489894161 in words is "two hundred thirty-six billion, four hundred eighty-nine million, eight hundred ninety-four thousand, one hundred sixty-one".