7556423521217 has 2 divisors, whose sum is σ = 7556423521218. Its totient is φ = 7556423521216.

The previous prime is 7556423521201. The next prime is 7556423521249. The reversal of 7556423521217 is 7121253246557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4372611384241 + 3183812136976 = 2091079^2 + 1784324^2 .

It is a cyclic number.

It is not a de Polignac number, because 7556423521217 - 2⁴ = 7556423521201 is a prime.

It is a super-2 number, since 2×7556423521217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7556423571217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3778211760608 + 3778211760609.

It is an arithmetic number, because the mean of its divisors is an integer number (3778211760609).

Almost surely, 2^{7556423521217} is an apocalyptic number.

It is an amenable number.

7556423521217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7556423521217 is an equidigital number, since it uses as much as digits as its factorization.

7556423521217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528000, while the sum is 50.

The spelling of 7556423521217 in words is "seven trillion, five hundred fifty-six billion, four hundred twenty-three million, five hundred twenty-one thousand, two hundred seventeen".