7421717332655 has 4 divisors (see below), whose sum is σ = 8906060799192. Its totient is φ = 5937373866120.

The previous prime is 7421717332649. The next prime is 7421717332751. The reversal of 7421717332655 is 5562337171247.

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

It is not a de Polignac number, because 7421717332655 - 2⁴ = 7421717332639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7421717332597 and 7421717332606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742171733261 + ... + 742171733270.

It is an arithmetic number, because the mean of its divisors is an integer number (2226515199798).

Almost surely, 2^{7421717332655} is an apocalyptic number.

7421717332655 is a deficient number, since it is larger than the sum of its proper divisors (1484343466537).

7421717332655 is a wasteful number, since it uses less digits than its factorization.

7421717332655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484343466536.

The product of its digits is 7408800, while the sum is 53.

The spelling of 7421717332655 in words is "seven trillion, four hundred twenty-one billion, seven hundred seventeen million, three hundred thirty-two thousand, six hundred fifty-five".