55487019168 has 480 divisors, whose sum is σ = 200881296000. Its totient is φ = 14663172096.

The previous prime is 55487019167. The next prime is 55487019209. The reversal of 55487019168 is 86191078455.

It is a happy number.

55487019168 is a `hidden beast` number, since 5 + 548 + 7 + 0 + 1 + 91 + 6 + 8 = 666.

It is a super-2 number, since 2×55487019168² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55487019167) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18196908 + ... + 18199956.

It is an arithmetic number, because the mean of its divisors is an integer number (418502700).

Almost surely, 2^55487019168 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 55487019168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100440648000).

55487019168 is an abundant number, since it is smaller than the sum of its proper divisors (145394276832).

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

55487019168 is a wasteful number, since it uses less digits than its factorization.

55487019168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 55487019168 in words is "fifty-five billion, four hundred eighty-seven million, nineteen thousand, one hundred sixty-eight".