53388688321 has 2 divisors, whose sum is σ = 53388688322. Its totient is φ = 53388688320.

The previous prime is 53388688303. The next prime is 53388688363. The reversal of 53388688321 is 12388688335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53349450625 + 39237696 = 230975^2 + 6264^2 .

It is a cyclic number.

It is not a de Polignac number, because 53388688321 - 2¹³ = 53388680129 is a prime.

It is not a weakly prime, because it can be changed into another prime (53388088321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26694344160 + 26694344161.

It is an arithmetic number, because the mean of its divisors is an integer number (26694344161).

Almost surely, 2^53388688321 is an apocalyptic number.

It is an amenable number.

53388688321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53388688321 is an equidigital number, since it uses as much as digits as its factorization.

53388688321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 55.

The spelling of 53388688321 in words is "fifty-three billion, three hundred eighty-eight million, six hundred eighty-eight thousand, three hundred twenty-one".