549521021633 has 2 divisors, whose sum is σ = 549521021634. Its totient is φ = 549521021632.

The previous prime is 549521021597. The next prime is 549521021723. The reversal of 549521021633 is 336120125945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480050822449 + 69470199184 = 692857^2 + 263572^2 .

It is a cyclic number.

It is not a de Polignac number, because 549521021633 - 2¹² = 549521017537 is a prime.

It is not a weakly prime, because it can be changed into another prime (549521021033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274760510816 + 274760510817.

It is an arithmetic number, because the mean of its divisors is an integer number (274760510817).

Almost surely, 2^549521021633 is an apocalyptic number.

It is an amenable number.

549521021633 is a deficient number, since it is larger than the sum of its proper divisors (1).

549521021633 is an equidigital number, since it uses as much as digits as its factorization.

549521021633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 549521021633 in words is "five hundred forty-nine billion, five hundred twenty-one million, twenty-one thousand, six hundred thirty-three".