30605405161 has 4 divisors (see below), whose sum is σ = 30622514500. Its totient is φ = 30588295824.

The previous prime is 30605405141. The next prime is 30605405189. The reversal of 30605405161 is 16150450603.

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 28914961936 + 1690443225 = 170044^2 + 41115^2 .

It is a cyclic number.

It is not a de Polignac number, because 30605405161 - 2²¹ = 30603308009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30605405141) 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, 8551986 + ... + 8555563.

It is an arithmetic number, because the mean of its divisors is an integer number (7655628625).

Almost surely, 2^30605405161 is an apocalyptic number.

It is an amenable number.

30605405161 is a deficient number, since it is larger than the sum of its proper divisors (17109339).

30605405161 is a wasteful number, since it uses less digits than its factorization.

30605405161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17109338.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 30605405161 its reverse (16150450603), we get a palindrome (46755855764).

The spelling of 30605405161 in words is "thirty billion, six hundred five million, four hundred five thousand, one hundred sixty-one".