2644402642 has 32 divisors (see below), whose sum is σ = 4789393920. Its totient is φ = 1070946240.

The previous prime is 2644402637. The next prime is 2644402687. The reversal of 2644402642 is 2462044462.

It is a junction number, because it is equal to n+sod(n) for n = 2644402598 and 2644402607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50209 + ... + 88372.

It is an arithmetic number, because the mean of its divisors is an integer number (149668560).

Almost surely, 2^2644402642 is an apocalyptic number.

2644402642 is a deficient number, since it is larger than the sum of its proper divisors (2144991278).

2644402642 is a wasteful number, since it uses less digits than its factorization.

2644402642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138666.

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 2644402642 is about 51423.7556193633. The cubic root of 2644402642 is about 1382.8525051629.

The spelling of 2644402642 in words is "two billion, six hundred forty-four million, four hundred two thousand, six hundred forty-two".