163331256061 has 2 divisors, whose sum is σ = 163331256062. Its totient is φ = 163331256060.

The previous prime is 163331256041. The next prime is 163331256079. The reversal of 163331256061 is 160652133361.

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., 157029912900 + 6301343161 = 396270^2 + 79381^2 .

It is a cyclic number.

It is not a de Polignac number, because 163331256061 - 2¹⁷ = 163331124989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163331256061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163331256041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81665628030 + 81665628031.

It is an arithmetic number, because the mean of its divisors is an integer number (81665628031).

Almost surely, 2^163331256061 is an apocalyptic number.

It is an amenable number.

163331256061 is a deficient number, since it is larger than the sum of its proper divisors (1).

163331256061 is an equidigital number, since it uses as much as digits as its factorization.

163331256061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

It can be divided in two parts, 16333125 and 6061, that added together give a triangular number (16339186 = T₅₇₁₆).

The spelling of 163331256061 in words is "one hundred sixty-three billion, three hundred thirty-one million, two hundred fifty-six thousand, sixty-one".