161129598737 has 2 divisors, whose sum is σ = 161129598738. Its totient is φ = 161129598736.

The previous prime is 161129598731. The next prime is 161129598739. The reversal of 161129598737 is 737895921161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157806768001 + 3322830736 = 397249^2 + 57644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161129598737 is a prime.

Together with 161129598739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161129598731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80564799368 + 80564799369.

It is an arithmetic number, because the mean of its divisors is an integer number (80564799369).

Almost surely, 2^161129598737 is an apocalyptic number.

It is an amenable number.

161129598737 is a deficient number, since it is larger than the sum of its proper divisors (1).

161129598737 is an equidigital number, since it uses as much as digits as its factorization.

161129598737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 59.

The spelling of 161129598737 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred ninety-eight thousand, seven hundred thirty-seven".