2115553544 has 16 divisors (see below), whose sum is σ = 4271791020. Its totient is φ = 976409280.

The previous prime is 2115553529. The next prime is 2115553577. The reversal of 2115553544 is 4453555112.

It can be written as a sum of positive squares in 2 ways, for example, as 1898344900 + 217208644 = 43570^2 + 14738^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10170827 + ... + 10171034.

Almost surely, 2^2115553544 is an apocalyptic number.

It is an amenable number.

2115553544 is an abundant number, since it is smaller than the sum of its proper divisors (2156237476).

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

2115553544 is a wasteful number, since it uses less digits than its factorization.

2115553544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20341880 (or 20341876 counting only the distinct ones).

The product of its digits is 60000, while the sum is 35.

The square root of 2115553544 is about 45995.1469613915. The cubic root of 2115553544 is about 1283.7329067276.

The spelling of 2115553544 in words is "two billion, one hundred fifteen million, five hundred fifty-three thousand, five hundred forty-four".