2644255642 has 8 divisors (see below), whose sum is σ = 4533009696. Its totient is φ = 1133252412.

The previous prime is 2644255591. The next prime is 2644255643. The reversal of 2644255642 is 2465524462.

2644255642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 2644255595 and 2644255604.

It is not an unprimeable number, because it can be changed into a prime (2644255643) 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, 94437688 + ... + 94437715.

It is an arithmetic number, because the mean of its divisors is an integer number (566626212).

Almost surely, 2^2644255642 is an apocalyptic number.

2644255642 is a deficient number, since it is larger than the sum of its proper divisors (1888754054).

2644255642 is a wasteful number, since it uses less digits than its factorization.

2644255642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188875412.

The product of its digits is 460800, while the sum is 40.

The square root of 2644255642 is about 51422.3262989920. The cubic root of 2644255642 is about 1382.8268808396.

The spelling of 2644255642 in words is "two billion, six hundred forty-four million, two hundred fifty-five thousand, six hundred forty-two".