163129512961 has 2 divisors, whose sum is σ = 163129512962. Its totient is φ = 163129512960.

The previous prime is 163129512899. The next prime is 163129512989. The reversal of 163129512961 is 169215921361.

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., 162373537936 + 755975025 = 402956^2 + 27495^2 .

It is an emirp because it is prime and its reverse (169215921361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163129512961 - 2⁹ = 163129512449 is a prime.

It is a super-2 number, since 2×163129512961² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163129512991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81564756480 + 81564756481.

It is an arithmetic number, because the mean of its divisors is an integer number (81564756481).

Almost surely, 2^163129512961 is an apocalyptic number.

It is an amenable number.

163129512961 is a deficient number, since it is larger than the sum of its proper divisors (1).

163129512961 is an equidigital number, since it uses as much as digits as its factorization.

163129512961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The spelling of 163129512961 in words is "one hundred sixty-three billion, one hundred twenty-nine million, five hundred twelve thousand, nine hundred sixty-one".