744821821672 has 32 divisors (see below), whose sum is σ = 1460505816000. Its totient is φ = 355425731584.

The previous prime is 744821821643. The next prime is 744821821673. The reversal of 744821821672 is 276128128447.

744821821672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (744821821673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4425118 + ... + 4590349.

It is an arithmetic number, because the mean of its divisors is an integer number (45640806750).

Almost surely, 2^744821821672 is an apocalyptic number.

It is an amenable number.

744821821672 is a deficient number, since it is larger than the sum of its proper divisors (715683994328).

744821821672 is a wasteful number, since it uses less digits than its factorization.

744821821672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9015945 (or 9015941 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 52.

The spelling of 744821821672 in words is "seven hundred forty-four billion, eight hundred twenty-one million, eight hundred twenty-one thousand, six hundred seventy-two".