2144789057 has 4 divisors (see below), whose sum is σ = 2144911956. Its totient is φ = 2144666160.

The previous prime is 2144789029. The next prime is 2144789093. The reversal of 2144789057 is 7509874412.

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 1849774081 + 295014976 = 43009^2 + 17176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144789057 - 2¹⁰ = 2144788033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144789557) 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, 29858 + ... + 71979.

It is an arithmetic number, because the mean of its divisors is an integer number (536227989).

Almost surely, 2^2144789057 is an apocalyptic number.

It is an amenable number.

2144789057 is a deficient number, since it is larger than the sum of its proper divisors (122899).

2144789057 is a wasteful number, since it uses less digits than its factorization.

2144789057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122898.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 2144789057 is about 46311.8673452065. The cubic root of 2144789057 is about 1289.6193129829.

The spelling of 2144789057 in words is "two billion, one hundred forty-four million, seven hundred eighty-nine thousand, fifty-seven".