55171864384 has 252 divisors, whose sum is σ = 145191175200. Its totient is φ = 20673709056.

The previous prime is 55171864361. The next prime is 55171864387. The reversal of 55171864384 is 48346817155.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55171864387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10066957 + ... + 10072435.

Almost surely, 2^55171864384 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 55171864384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72595587600).

55171864384 is an abundant number, since it is smaller than the sum of its proper divisors (90019310816).

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

55171864384 is a wasteful number, since it uses less digits than its factorization.

55171864384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550 (or 5520 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 52.

The spelling of 55171864384 in words is "fifty-five billion, one hundred seventy-one million, eight hundred sixty-four thousand, three hundred eighty-four".