161305453325 has 12 divisors (see below), whose sum is σ = 200756847168. Its totient is φ = 128568178800.

The previous prime is 161305453291. The next prime is 161305453369. The reversal of 161305453325 is 523354503161.

161305453325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161305453325 - 2¹⁸ = 161305191181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11897687 + ... + 11911236.

It is an arithmetic number, because the mean of its divisors is an integer number (16729737264).

Almost surely, 2^161305453325 is an apocalyptic number.

It is an amenable number.

161305453325 is a deficient number, since it is larger than the sum of its proper divisors (39451393843).

161305453325 is a wasteful number, since it uses less digits than its factorization.

161305453325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809204 (or 23809199 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 161305453325 its reverse (523354503161), we get a palindrome (684659956486).

The spelling of 161305453325 in words is "one hundred sixty-one billion, three hundred five million, four hundred fifty-three thousand, three hundred twenty-five".