53727644021 has 2 divisors, whose sum is σ = 53727644022. Its totient is φ = 53727644020.

The previous prime is 53727643987. The next prime is 53727644027. The reversal of 53727644021 is 12044672735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45405643396 + 8322000625 = 213086^2 + 91225^2 .

It is a cyclic number.

It is not a de Polignac number, because 53727644021 - 2¹⁴ = 53727627637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53727644021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53727644027) 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, 26863822010 + 26863822011.

It is an arithmetic number, because the mean of its divisors is an integer number (26863822011).

Almost surely, 2^53727644021 is an apocalyptic number.

It is an amenable number.

53727644021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53727644021 is an equidigital number, since it uses as much as digits as its factorization.

53727644021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 53727644021 in words is "fifty-three billion, seven hundred twenty-seven million, six hundred forty-four thousand, twenty-one".