161134691129 has 2 divisors, whose sum is σ = 161134691130. Its totient is φ = 161134691128.

The previous prime is 161134691089. The next prime is 161134691141. The reversal of 161134691129 is 921196431161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153446908729 + 7687782400 = 391723^2 + 87680^2 .

It is a cyclic number.

It is not a de Polignac number, because 161134691129 - 2¹² = 161134687033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161134691129.

It is not a weakly prime, because it can be changed into another prime (161134691929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80567345564 + 80567345565.

It is an arithmetic number, because the mean of its divisors is an integer number (80567345565).

Almost surely, 2^161134691129 is an apocalyptic number.

It is an amenable number.

161134691129 is a deficient number, since it is larger than the sum of its proper divisors (1).

161134691129 is an equidigital number, since it uses as much as digits as its factorization.

161134691129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The spelling of 161134691129 in words is "one hundred sixty-one billion, one hundred thirty-four million, six hundred ninety-one thousand, one hundred twenty-nine".