7421755536645 has 16 divisors (see below), whose sum is σ = 12499798799040. Its totient is φ = 3749939639424.

The previous prime is 7421755536641. The next prime is 7421755536817. The reversal of 7421755536645 is 5466355571247.

It is not a de Polignac number, because 7421755536645 - 2² = 7421755536641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421755536641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13020623464 + ... + 13020624033.

It is an arithmetic number, because the mean of its divisors is an integer number (781237424940).

Almost surely, 2^{7421755536645} is an apocalyptic number.

It is an amenable number.

7421755536645 is a deficient number, since it is larger than the sum of its proper divisors (5078043262395).

7421755536645 is a wasteful number, since it uses less digits than its factorization.

7421755536645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26041247524.

The product of its digits is 105840000, while the sum is 60.

The spelling of 7421755536645 in words is "seven trillion, four hundred twenty-one billion, seven hundred fifty-five million, five hundred thirty-six thousand, six hundred forty-five".