161137625 has 16 divisors (see below), whose sum is σ = 219383424. Its totient is φ = 117190000.

The previous prime is 161137621. The next prime is 161137631. The reversal of 161137625 is 526731161.

It is not a de Polignac number, because 161137625 - 2² = 161137621 is a prime.

It is a super-3 number, since 3×161137625³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161137591 and 161137600.

It is not an unprimeable number, because it can be changed into a prime (161137621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57221 + ... + 59970.

It is an arithmetic number, because the mean of its divisors is an integer number (13711464).

Almost surely, 2^161137625 is an apocalyptic number.

It is an amenable number.

161137625 is a deficient number, since it is larger than the sum of its proper divisors (58245799).

161137625 is a wasteful number, since it uses less digits than its factorization.

161137625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117217 (or 117207 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 161137625 is about 12693.9995667244. Note that the first 3 decimals coincide. The cubic root of 161137625 is about 544.1671480768.

Adding to 161137625 its reverse (526731161), we get a palindrome (687868786).

The spelling of 161137625 in words is "one hundred sixty-one million, one hundred thirty-seven thousand, six hundred twenty-five".