7744454956321 has 4 divisors (see below), whose sum is σ = 7783766910612. Its totient is φ = 7705143002032.

The previous prime is 7744454956319. The next prime is 7744454956349. The reversal of 7744454956321 is 1236594544477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7540164516096 + 204290440225 = 2745936^2 + 451985^2 .

It is a cyclic number.

It is not a de Polignac number, because 7744454956321 - 2¹ = 7744454956319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7744454956321.

It is not an unprimeable number, because it can be changed into a prime (7744454956421) 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, 19655976850 + ... + 19655977243.

It is an arithmetic number, because the mean of its divisors is an integer number (1945941727653).

Almost surely, 2^{7744454956321} is an apocalyptic number.

It is an amenable number.

7744454956321 is a deficient number, since it is larger than the sum of its proper divisors (39311954291).

7744454956321 is a wasteful number, since it uses less digits than its factorization.

7744454956321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39311954290.

The product of its digits is 101606400, while the sum is 61.

The spelling of 7744454956321 in words is "seven trillion, seven hundred forty-four billion, four hundred fifty-four million, nine hundred fifty-six thousand, three hundred twenty-one".