236688820961 has 2 divisors, whose sum is σ = 236688820962. Its totient is φ = 236688820960.

The previous prime is 236688820939. The next prime is 236688820997. The reversal of 236688820961 is 169028886632.

236688820961 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., 152124180961 + 84564640000 = 390031^2 + 290800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-236688820961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 236688820961.

It is not a weakly prime, because it can be changed into another prime (236688826961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118344410480 + 118344410481.

It is an arithmetic number, because the mean of its divisors is an integer number (118344410481).

Almost surely, 2^236688820961 is an apocalyptic number.

It is an amenable number.

236688820961 is a deficient number, since it is larger than the sum of its proper divisors (1).

236688820961 is an equidigital number, since it uses as much as digits as its factorization.

236688820961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 236688820961 in words is "two hundred thirty-six billion, six hundred eighty-eight million, eight hundred twenty thousand, nine hundred sixty-one".