42278480636321 has 2 divisors, whose sum is σ = 42278480636322. Its totient is φ = 42278480636320.

The previous prime is 42278480636261. The next prime is 42278480636401. The reversal of 42278480636321 is 12363608487224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26699387451025 + 15579093185296 = 5167145^2 + 3947036^2 .

It is a cyclic number.

It is not a de Polignac number, because 42278480636321 - 2¹⁰ = 42278480635297 is a prime.

It is not a weakly prime, because it can be changed into another prime (42278480636521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21139240318160 + 21139240318161.

It is an arithmetic number, because the mean of its divisors is an integer number (21139240318161).

Almost surely, 2^{42278480636321} is an apocalyptic number.

It is an amenable number.

42278480636321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42278480636321 is an equidigital number, since it uses as much as digits as its factorization.

42278480636321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18579456, while the sum is 56.

The spelling of 42278480636321 in words is "forty-two trillion, two hundred seventy-eight billion, four hundred eighty million, six hundred thirty-six thousand, three hundred twenty-one".