55161560 has 64 divisors (see below), whose sum is σ = 131695200. Its totient is φ = 20736000.

The previous prime is 55161559. The next prime is 55161563. The reversal of 55161560 is 6516155.

55161560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55161563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137360 + ... + 137760.

Almost surely, 2^55161560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55161560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65847600).

55161560 is an abundant number, since it is smaller than the sum of its proper divisors (76533640).

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

55161560 is a wasteful number, since it uses less digits than its factorization.

55161560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55161560 is about 7427.0828728378. The cubic root of 55161560 is about 380.6672487330.

The spelling of 55161560 in words is "fifty-five million, one hundred sixty-one thousand, five hundred sixty".