2161544403152 has 20 divisors (see below), whose sum is σ = 4188027903300. Its totient is φ = 1080763008768.

The previous prime is 2161544403131. The next prime is 2161544403163. The reversal of 2161544403152 is 2513044451612.

It can be written as a sum of positive squares in 2 ways, for example, as 469109927056 + 1692434476096 = 684916^2 + 1300936^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1619108 + ... + 2635260.

It is an arithmetic number, because the mean of its divisors is an integer number (209401395165).

Almost surely, 2^{2161544403152} is an apocalyptic number.

It is an amenable number.

2161544403152 is a deficient number, since it is larger than the sum of its proper divisors (2026483500148).

2161544403152 is a wasteful number, since it uses less digits than its factorization.

2161544403152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149110 (or 1149104 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 2161544403152 its reverse (2513044451612), we get a palindrome (4674588854764).

The spelling of 2161544403152 in words is "two trillion, one hundred sixty-one billion, five hundred forty-four million, four hundred three thousand, one hundred fifty-two".