2149644523 has 8 divisors (see below), whose sum is σ = 2320164000. Its totient is φ = 1979862528.

The previous prime is 2149644491. The next prime is 2149644529. The reversal of 2149644523 is 3254469412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2149644523 - 2⁵ = 2149644491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149644529) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 178303 + ... + 189976.

It is an arithmetic number, because the mean of its divisors is an integer number (290020500).

Almost surely, 2^2149644523 is an apocalyptic number.

2149644523 is a deficient number, since it is larger than the sum of its proper divisors (170519477).

2149644523 is a wasteful number, since it uses less digits than its factorization.

2149644523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368741.

The product of its digits is 207360, while the sum is 40.

The square root of 2149644523 is about 46364.2591119496. The cubic root of 2149644523 is about 1290.5917448202.

The spelling of 2149644523 in words is "two billion, one hundred forty-nine million, six hundred forty-four thousand, five hundred twenty-three".