54540736021 has 2 divisors, whose sum is σ = 54540736022. Its totient is φ = 54540736020.

The previous prime is 54540736001. The next prime is 54540736043. The reversal of 54540736021 is 12063704545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41937305796 + 12603430225 = 204786^2 + 112265^2 .

It is a cyclic number.

It is not a de Polignac number, because 54540736021 - 2¹⁵ = 54540703253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54540736001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27270368010 + 27270368011.

It is an arithmetic number, because the mean of its divisors is an integer number (27270368011).

Almost surely, 2^54540736021 is an apocalyptic number.

It is an amenable number.

54540736021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54540736021 is an equidigital number, since it uses as much as digits as its factorization.

54540736021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 54540736021 in words is "fifty-four billion, five hundred forty million, seven hundred thirty-six thousand, twenty-one".