1644994058 has 8 divisors (see below), whose sum is σ = 2469764352. Its totient is φ = 821739276.

The previous prime is 1644994051. The next prime is 1644994061. The reversal of 1644994058 is 8504994461.

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 = 1644993997 and 1644994015.

It is not an unprimeable number, because it can be changed into a prime (1644994051) 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, 376160 + ... + 380507.

It is an arithmetic number, because the mean of its divisors is an integer number (308720544).

Almost surely, 2^1644994058 is an apocalyptic number.

1644994058 is a deficient number, since it is larger than the sum of its proper divisors (824770294).

1644994058 is a wasteful number, since it uses less digits than its factorization.

1644994058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757756.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 1644994058 is about 40558.5263292443. The cubic root of 1644994058 is about 1180.4695196562.

The spelling of 1644994058 in words is "one billion, six hundred forty-four million, nine hundred ninety-four thousand, fifty-eight".