161606152 has 8 divisors (see below), whose sum is σ = 303011550. Its totient is φ = 80803072.

The previous prime is 161606149. The next prime is 161606167. The reversal of 161606152 is 251606161.

It can be written as a sum of positive squares in only one way, i.e., 90136036 + 71470116 = 9494^2 + 8454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×161606152² = 52233096728494208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 161606152.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10100377 + ... + 10100392.

Almost surely, 2^161606152 is an apocalyptic number.

It is an amenable number.

161606152 is a deficient number, since it is larger than the sum of its proper divisors (141405398).

161606152 is a wasteful number, since it uses less digits than its factorization.

161606152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200775 (or 20200771 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161606152 is about 12712.4408356539. The cubic root of 161606152 is about 544.6940481800.

Subtracting 161606152 from its reverse (251606161), we obtain a palindrome (90000009).

The spelling of 161606152 in words is "one hundred sixty-one million, six hundred six thousand, one hundred fifty-two".