161612325 has 36 divisors (see below), whose sum is σ = 330821088. Its totient is φ = 73879200.

The previous prime is 161612303. The next prime is 161612327. The reversal of 161612325 is 523216161.

161612325 is a `hidden beast` number, since 1 + 616 + 1 + 23 + 25 = 666.

It is not a de Polignac number, because 161612325 - 2⁷ = 161612197 is a prime.

It is a super-2 number, since 2×161612325² = 52237087183811250, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161612327) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49731 + ... + 52880.

Almost surely, 2^161612325 is an apocalyptic number.

161612325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161612325 is an abundant number, since it is smaller than the sum of its proper divisors (169208763).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161612325 is a wasteful number, since it uses less digits than its factorization.

161612325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102634 (or 102626 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161612325 is about 12712.6836269924. The cubic root of 161612325 is about 544.7009834637.

Adding to 161612325 its reverse (523216161), we get a palindrome (684828486).

The spelling of 161612325 in words is "one hundred sixty-one million, six hundred twelve thousand, three hundred twenty-five".