2144776642 has 4 divisors (see below), whose sum is σ = 3217164966. Its totient is φ = 1072388320.

The previous prime is 2144776631. The next prime is 2144776643. The reversal of 2144776642 is 2466774412.

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

It can be written as a sum of positive squares in only one way, i.e., 2139155001 + 5621641 = 46251^2 + 2371^2 .

It is not an unprimeable number, because it can be changed into a prime (2144776643) by changing a digit.

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 as a sum of consecutive naturals, namely, 536194159 + ... + 536194162.

Almost surely, 2^2144776642 is an apocalyptic number.

2144776642 is a deficient number, since it is larger than the sum of its proper divisors (1072388324).

2144776642 is a wasteful number, since it uses less digits than its factorization.

2144776642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072388323.

The product of its digits is 451584, while the sum is 43.

The square root of 2144776642 is about 46311.7333080937. The cubic root of 2144776642 is about 1289.6168246800.

It can be divided in two parts, 21447 and 76642, that added together give a palindrome (98089).

The spelling of 2144776642 in words is "two billion, one hundred forty-four million, seven hundred seventy-six thousand, six hundred forty-two".