55442172000 has 192 divisors, whose sum is σ = 181948987584. Its totient is φ = 14758502400.

The previous prime is 55442171963. The next prime is 55442172031. The reversal of 55442172000 is 27124455.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7352232 + ... + 7359768.

It is an arithmetic number, because the mean of its divisors is an integer number (947650977).

Almost surely, 2^55442172000 is an apocalyptic number.

55442172000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55442172000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90974493792).

55442172000 is an abundant number, since it is smaller than the sum of its proper divisors (126506815584).

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

55442172000 is a wasteful number, since it uses less digits than its factorization.

55442172000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8178 (or 8160 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

Adding to 55442172000 its reverse (27124455), we get a palindrome (55469296455).

The spelling of 55442172000 in words is "fifty-five billion, four hundred forty-two million, one hundred seventy-two thousand".