7420722728453 has 4 divisors (see below), whose sum is σ = 7461721196748. Its totient is φ = 7379724260160.

The previous prime is 7420722728437. The next prime is 7420722728519. The reversal of 7420722728453 is 3548272270247.

It is a happy number.

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 55567218529 + 7365155509924 = 235727^2 + 2713882^2 .

It is a cyclic number.

It is not a de Polignac number, because 7420722728453 - 2⁴ = 7420722728437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7420722728395 and 7420722728404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7420722728753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20499233876 + ... + 20499234237.

It is an arithmetic number, because the mean of its divisors is an integer number (1865430299187).

Almost surely, 2^{7420722728453} is an apocalyptic number.

It is an amenable number.

7420722728453 is a deficient number, since it is larger than the sum of its proper divisors (40998468295).

7420722728453 is a wasteful number, since it uses less digits than its factorization.

7420722728453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40998468294.

The product of its (nonzero) digits is 10536960, while the sum is 53.

The spelling of 7420722728453 in words is "seven trillion, four hundred twenty billion, seven hundred twenty-two million, seven hundred twenty-eight thousand, four hundred fifty-three".