55224072540 has 576 divisors, whose sum is σ = 214509496320. Its totient is φ = 11548293120.

The previous prime is 55224072539. The next prime is 55224072577. The reversal of 55224072540 is 4527042255.

55224072540 is a `hidden beast` number, since 5 + 5 + 2 + 2 + 40 + 72 + 540 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 55224072495 and 55224072504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 87518025 + ... + 87518655.

It is an arithmetic number, because the mean of its divisors is an integer number (372412320).

Almost surely, 2^55224072540 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 55224072540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107254748160).

55224072540 is an abundant number, since it is smaller than the sum of its proper divisors (159285423780).

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

55224072540 is a wasteful number, since it uses less digits than its factorization.

55224072540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 36.

The spelling of 55224072540 in words is "fifty-five billion, two hundred twenty-four million, seventy-two thousand, five hundred forty".