55161612 has 36 divisors (see below), whose sum is σ = 152113416. Its totient is φ = 16715520.

The previous prime is 55161581. The next prime is 55161619. The reversal of 55161612 is 21616155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (55161619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69253 + ... + 70044.

Almost surely, 2^55161612 is an apocalyptic number.

It is an amenable number.

55161612 is an abundant number, since it is smaller than the sum of its proper divisors (96951804).

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

55161612 is a wasteful number, since it uses less digits than its factorization.

55161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139318 (or 139313 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 55161612 is about 7427.0863735384. The cubic root of 55161612 is about 380.6673683494.

Adding to 55161612 its reverse (21616155), we get a palindrome (76777767).

The spelling of 55161612 in words is "fifty-five million, one hundred sixty-one thousand, six hundred twelve".