2331661155361 has 2 divisors, whose sum is σ = 2331661155362. Its totient is φ = 2331661155360.

The previous prime is 2331661155347. The next prime is 2331661155371. The reversal of 2331661155361 is 1635511661332.

It is a happy number.

2331661155361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1855809522961 + 475851632400 = 1362281^2 + 689820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331661155361 - 2⁷ = 2331661155233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2331661155301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165830577680 + 1165830577681.

It is an arithmetic number, because the mean of its divisors is an integer number (1165830577681).

Almost surely, 2^{2331661155361} is an apocalyptic number.

It is an amenable number.

2331661155361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331661155361 is an equidigital number, since it uses as much as digits as its factorization.

2331661155361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The spelling of 2331661155361 in words is "two trillion, three hundred thirty-one billion, six hundred sixty-one million, one hundred fifty-five thousand, three hundred sixty-one".