161112512 has 28 divisors (see below), whose sum is σ = 348773496. Its totient is φ = 73232640.

The previous prime is 161112503. The next prime is 161112559. The reversal of 161112512 is 215211161.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 113723 + ... + 115130.

Almost surely, 2^161112512 is an apocalyptic number.

It is an amenable number.

161112512 is an abundant number, since it is smaller than the sum of its proper divisors (187660984).

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

161112512 is a wasteful number, since it uses less digits than its factorization.

161112512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228876 (or 228866 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 161112512 is about 12693.0103600367. The cubic root of 161112512 is about 544.1388774611.

Adding to 161112512 its reverse (215211161), we get a palindrome (376323673).

The spelling of 161112512 in words is "one hundred sixty-one million, one hundred twelve thousand, five hundred twelve".