15423656161 has 2 divisors, whose sum is σ = 15423656162. Its totient is φ = 15423656160.

The previous prime is 15423656069. The next prime is 15423656243. The reversal of 15423656161 is 16165632451.

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., 14651649936 + 772006225 = 121044^2 + 27785^2 .

It is a cyclic number.

It is not a de Polignac number, because 15423656161 - 2⁷ = 15423656033 is a prime.

It is not a weakly prime, because it can be changed into another prime (15423656461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7711828080 + 7711828081.

It is an arithmetic number, because the mean of its divisors is an integer number (7711828081).

Almost surely, 2^15423656161 is an apocalyptic number.

It is an amenable number.

15423656161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15423656161 is an equidigital number, since it uses as much as digits as its factorization.

15423656161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The spelling of 15423656161 in words is "fifteen billion, four hundred twenty-three million, six hundred fifty-six thousand, one hundred sixty-one".