2644380542 has 8 divisors (see below), whose sum is σ = 3967245336. Its totient is φ = 1321965432.

The previous prime is 2644380523. The next prime is 2644380551. The reversal of 2644380542 is 2450834462.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2644380496 and 2644380505.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 97313 + ... + 121484.

It is an arithmetic number, because the mean of its divisors is an integer number (495905667).

Almost surely, 2^2644380542 is an apocalyptic number.

2644380542 is a deficient number, since it is larger than the sum of its proper divisors (1322864794).

2644380542 is a wasteful number, since it uses less digits than its factorization.

2644380542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224842.

The product of its (nonzero) digits is 184320, while the sum is 38.

The square root of 2644380542 is about 51423.5407376816. The cubic root of 2644380542 is about 1382.8486528593.

The spelling of 2644380542 in words is "two billion, six hundred forty-four million, three hundred eighty thousand, five hundred forty-two".