2154335543149 has 4 divisors (see below), whose sum is σ = 2165271256764. Its totient is φ = 2143399829536.

The previous prime is 2154335543131. The next prime is 2154335543153. The reversal of 2154335543149 is 9413455334512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1598277492900 + 556058050249 = 1264230^2 + 745693^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154335543149 - 2¹⁹ = 2154335018861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154335543249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5467856512 + ... + 5467856905.

It is an arithmetic number, because the mean of its divisors is an integer number (541317814191).

Almost surely, 2^{2154335543149} is an apocalyptic number.

It is an amenable number.

2154335543149 is a deficient number, since it is larger than the sum of its proper divisors (10935713615).

2154335543149 is a wasteful number, since it uses less digits than its factorization.

2154335543149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10935713614.

The product of its digits is 3888000, while the sum is 49.

The spelling of 2154335543149 in words is "two trillion, one hundred fifty-four billion, three hundred thirty-five million, five hundred forty-three thousand, one hundred forty-nine".