2123601644 has 6 divisors (see below), whose sum is σ = 3716302884. Its totient is φ = 1061800820.

The previous prime is 2123601629. The next prime is 2123601679. The reversal of 2123601644 is 4461063212.

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 as a sum of consecutive naturals, namely, 265450202 + ... + 265450209.

It is an arithmetic number, because the mean of its divisors is an integer number (619383814).

Almost surely, 2^2123601644 is an apocalyptic number.

It is an amenable number.

2123601644 is a deficient number, since it is larger than the sum of its proper divisors (1592701240).

2123601644 is a wasteful number, since it uses less digits than its factorization.

2123601644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530900415 (or 530900413 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2123601644 is about 46082.5524900694. The cubic root of 2123601644 is about 1285.3587281906.

Adding to 2123601644 its reverse (4461063212), we get a palindrome (6584664856).

The spelling of 2123601644 in words is "two billion, one hundred twenty-three million, six hundred one thousand, six hundred forty-four".