2163725444 has 6 divisors (see below), whose sum is σ = 3786519534. Its totient is φ = 1081862720.

The previous prime is 2163725419. The next prime is 2163725503. The reversal of 2163725444 is 4445273612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1807950400 + 355775044 = 42520^2 + 18862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2163725398 and 2163725407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270465677 + ... + 270465684.

It is an arithmetic number, because the mean of its divisors is an integer number (631086589).

Almost surely, 2^2163725444 is an apocalyptic number.

It is an amenable number.

2163725444 is a deficient number, since it is larger than the sum of its proper divisors (1622794090).

2163725444 is a wasteful number, since it uses less digits than its factorization.

2163725444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540931365 (or 540931363 counting only the distinct ones).

The product of its digits is 161280, while the sum is 38.

The square root of 2163725444 is about 46515.8622837414. The cubic root of 2163725444 is about 1293.4035562242.

The spelling of 2163725444 in words is "two billion, one hundred sixty-three million, seven hundred twenty-five thousand, four hundred forty-four".