1553545243044 has 72 divisors (see below), whose sum is σ = 3992238464760. Its totient is φ = 509251392000.

The previous prime is 1553545243021. The next prime is 1553545243093. The reversal of 1553545243044 is 4403425453551.

1553545243044 is a `hidden beast` number, since 1 + 5 + 5 + 3 + 54 + 524 + 30 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 51724404900 + 1501820838144 = 227430^2 + 1225488^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10663894 + ... + 10808594.

It is an arithmetic number, because the mean of its divisors is an integer number (55447756455).

Almost surely, 2^{1553545243044} 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 1553545243044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996119232380).

1553545243044 is an abundant number, since it is smaller than the sum of its proper divisors (2438693221716).

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

1553545243044 is a wasteful number, since it uses less digits than its factorization.

1553545243044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149661 (or 149656 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

The spelling of 1553545243044 in words is "one trillion, five hundred fifty-three billion, five hundred forty-five million, two hundred forty-three thousand, forty-four".