53259373621 has 2 divisors, whose sum is σ = 53259373622. Its totient is φ = 53259373620.

The previous prime is 53259373589. The next prime is 53259373649. The reversal of 53259373621 is 12637395235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49979520721 + 3279852900 = 223561^2 + 57270^2 .

It is a cyclic number.

It is not a de Polignac number, because 53259373621 - 2⁵ = 53259373589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53259373121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26629686810 + 26629686811.

It is an arithmetic number, because the mean of its divisors is an integer number (26629686811).

Almost surely, 2^53259373621 is an apocalyptic number.

It is an amenable number.

53259373621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53259373621 is an equidigital number, since it uses as much as digits as its factorization.

53259373621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 46.

The spelling of 53259373621 in words is "fifty-three billion, two hundred fifty-nine million, three hundred seventy-three thousand, six hundred twenty-one".