55012515444 has 96 divisors (see below), whose sum is σ = 148129228800. Its totient is φ = 17643057120.

The previous prime is 55012515413. The next prime is 55012515449. The reversal of 55012515444 is 44451521055.

55012515444 is a `hidden beast` number, since 5 + 50 + 12 + 51 + 544 + 4 = 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 = 55012515399 and 55012515408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55012515449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207639 + ... + 391329.

It is an arithmetic number, because the mean of its divisors is an integer number (1543012800).

Almost surely, 2^55012515444 is an apocalyptic number.

55012515444 is a gapful number since it is divisible by the number (54) 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 55012515444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74064614400).

55012515444 is an abundant number, since it is smaller than the sum of its proper divisors (93116713356).

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

55012515444 is a wasteful number, since it uses less digits than its factorization.

55012515444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183810 (or 183802 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 55012515444 in words is "fifty-five billion, twelve million, five hundred fifteen thousand, four hundred forty-four".