4481537386321 has 2 divisors, whose sum is σ = 4481537386322. Its totient is φ = 4481537386320.

The previous prime is 4481537386279. The next prime is 4481537386387. The reversal of 4481537386321 is 1236837351844.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3152275966225 + 1329261420096 = 1775465^2 + 1152936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4481537386321 - 2²³ = 4481528997713 is a prime.

It is not a weakly prime, because it can be changed into another prime (4481537386121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2240768693160 + 2240768693161.

It is an arithmetic number, because the mean of its divisors is an integer number (2240768693161).

Almost surely, 2^{4481537386321} is an apocalyptic number.

It is an amenable number.

4481537386321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4481537386321 is an equidigital number, since it uses as much as digits as its factorization.

4481537386321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 55.

The spelling of 4481537386321 in words is "four trillion, four hundred eighty-one billion, five hundred thirty-seven million, three hundred eighty-six thousand, three hundred twenty-one".