548623327921 has 2 divisors, whose sum is σ = 548623327922. Its totient is φ = 548623327920.

The previous prime is 548623327919. The next prime is 548623327927. The reversal of 548623327921 is 129723326845.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416644430400 + 131978897521 = 645480^2 + 363289^2 .

It is a cyclic number.

It is not a de Polignac number, because 548623327921 - 2¹ = 548623327919 is a prime.

It is a super-2 number, since 2×548623327921² (a number of 24 digits) contains 22 as substring.

Together with 548623327919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (548623327927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274311663960 + 274311663961.

It is an arithmetic number, because the mean of its divisors is an integer number (274311663961).

Almost surely, 2^548623327921 is an apocalyptic number.

It is an amenable number.

548623327921 is a deficient number, since it is larger than the sum of its proper divisors (1).

548623327921 is an equidigital number, since it uses as much as digits as its factorization.

548623327921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 52.

The spelling of 548623327921 in words is "five hundred forty-eight billion, six hundred twenty-three million, three hundred twenty-seven thousand, nine hundred twenty-one".