161032401133 has 4 divisors (see below), whose sum is σ = 161116580988. Its totient is φ = 160948221280.

The previous prime is 161032401121. The next prime is 161032401139. The reversal of 161032401133 is 331104230161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73204336969 + 87828064164 = 270563^2 + 296358^2 .

It is a cyclic number.

It is not a de Polignac number, because 161032401133 - 2²¹ = 161030303981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161032401098 and 161032401107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161032401139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42087058 + ... + 42090883.

It is an arithmetic number, because the mean of its divisors is an integer number (40279145247).

Almost surely, 2^161032401133 is an apocalyptic number.

It is an amenable number.

161032401133 is a deficient number, since it is larger than the sum of its proper divisors (84179855).

161032401133 is an equidigital number, since it uses as much as digits as its factorization.

161032401133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84179854.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 161032401133 its reverse (331104230161), we get a palindrome (492136631294).

The spelling of 161032401133 in words is "one hundred sixty-one billion, thirty-two million, four hundred one thousand, one hundred thirty-three".