55917612 has 72 divisors (see below), whose sum is σ = 145297152. Its totient is φ = 18127200.

The previous prime is 55917599. The next prime is 55917613. The reversal of 55917612 is 21671955.

55917612 is a `hidden beast` number, since 5 + 591 + 7 + 61 + 2 = 666.

55917612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55917613) 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 23 ways as a sum of consecutive naturals, for example, 334753 + ... + 334919.

It is an arithmetic number, because the mean of its divisors is an integer number (2018016).

Almost surely, 2^55917612 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 55917612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72648576).

55917612 is an abundant number, since it is smaller than the sum of its proper divisors (89379540).

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

55917612 is a wasteful number, since it uses less digits than its factorization.

55917612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 374 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 55917612 is about 7477.8079675798. The cubic root of 55917612 is about 382.3985223562.

It can be divided in two parts, 5591 and 7612, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 55917612 in words is "fifty-five million, nine hundred seventeen thousand, six hundred twelve".