161627265 has 16 divisors (see below), whose sum is σ = 287337600. Its totient is φ = 86201136.

The previous prime is 161627251. The next prime is 161627267. The reversal of 161627265 is 562726161.

It is a happy number.

161627265 is a `hidden beast` number, since 1 + 6 + 1 + 627 + 26 + 5 = 666.

It is not a de Polignac number, because 161627265 - 2⁶ = 161627201 is a prime.

It is a super-2 number, since 2×161627265² = 52246745582760450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161627267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598485 + ... + 598754.

It is an arithmetic number, because the mean of its divisors is an integer number (17958600).

Almost surely, 2^161627265 is an apocalyptic number.

161627265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161627265 is a deficient number, since it is larger than the sum of its proper divisors (125710335).

161627265 is a wasteful number, since it uses less digits than its factorization.

161627265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197253 (or 1197247 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 161627265 is about 12713.2712155448. The cubic root of 161627265 is about 544.7177676249.

The spelling of 161627265 in words is "one hundred sixty-one million, six hundred twenty-seven thousand, two hundred sixty-five".