744687979121 has 12 divisors (see below), whose sum is σ = 750418496100. Its totient is φ = 739000281600.

The previous prime is 744687979039. The next prime is 744687979127. The reversal of 744687979121 is 121979786447.

It can be written as a sum of positive squares in 2 ways, for example, as 112879200625 + 631808778496 = 335975^2 + 794864^2 .

It is a de Polignac number, because none of the positive numbers 2^k-744687979121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (744687979127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22990025 + ... + 23022393.

It is an arithmetic number, because the mean of its divisors is an integer number (62534874675).

Almost surely, 2^744687979121 is an apocalyptic number.

It is an amenable number.

744687979121 is a deficient number, since it is larger than the sum of its proper divisors (5730516979).

744687979121 is a wasteful number, since it uses less digits than its factorization.

744687979121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33680 (or 33529 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 65.

The spelling of 744687979121 in words is "seven hundred forty-four billion, six hundred eighty-seven million, nine hundred seventy-nine thousand, one hundred twenty-one".