13551550044 has 96 divisors (see below), whose sum is σ = 35471278080. Its totient is φ = 4006208448.

The previous prime is 13551550039. The next prime is 13551550069. The reversal of 13551550044 is 44005515531.

It is a junction number, because it is equal to n+sod(n) for n = 13551549987 and 13551550014.

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, 218977 + ... + 273959.

It is an arithmetic number, because the mean of its divisors is an integer number (369492480).

Almost surely, 2^13551550044 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 13551550044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17735639040).

13551550044 is an abundant number, since it is smaller than the sum of its proper divisors (21919728036).

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

13551550044 is a wasteful number, since it uses less digits than its factorization.

13551550044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55079 (or 55077 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 13551550044 in words is "thirteen billion, five hundred fifty-one million, five hundred fifty thousand, forty-four".