4444721642 has 8 divisors (see below), whose sum is σ = 7017981600. Its totient is φ = 2105394444.

The previous prime is 4444721639. The next prime is 4444721651. The reversal of 4444721642 is 2461274444.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 116966359 = 4444721642 / (4 + 4 + 4 + 4 + 7 + 2 + 1 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 4444721596 and 4444721605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58483142 + ... + 58483217.

It is an arithmetic number, because the mean of its divisors is an integer number (877247700).

Almost surely, 2^4444721642 is an apocalyptic number.

4444721642 is a deficient number, since it is larger than the sum of its proper divisors (2573259958).

4444721642 is a wasteful number, since it uses less digits than its factorization.

4444721642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116966380.

The product of its digits is 172032, while the sum is 38.

The square root of 4444721642 is about 66668.7456159181. The cubic root of 4444721642 is about 1644.1755635743.

The spelling of 4444721642 in words is "four billion, four hundred forty-four million, seven hundred twenty-one thousand, six hundred forty-two".