161530604425 has 6 divisors (see below), whose sum is σ = 200297949518. Its totient is φ = 129224483520.

The previous prime is 161530604413. The next prime is 161530604449. The reversal of 161530604425 is 524406035161.

It can be written as a sum of positive squares in 3 ways, for example, as 1424987001 + 160105617424 = 37749^2 + 400132^2 .

It is not a de Polignac number, because 161530604425 - 2¹⁹ = 161530080137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3230612064 + ... + 3230612113.

Almost surely, 2^161530604425 is an apocalyptic number.

It is an amenable number.

161530604425 is a deficient number, since it is larger than the sum of its proper divisors (38767345093).

161530604425 is an equidigital number, since it uses as much as digits as its factorization.

161530604425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461224187 (or 6461224182 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 161530604425 its reverse (524406035161), we get a palindrome (685936639586).

The spelling of 161530604425 in words is "one hundred sixty-one billion, five hundred thirty million, six hundred four thousand, four hundred twenty-five".