52805078621 has 2 divisors, whose sum is σ = 52805078622. Its totient is φ = 52805078620.

The previous prime is 52805078537. The next prime is 52805078629. The reversal of 52805078621 is 12687050825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45907776121 + 6897302500 = 214261^2 + 83050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52805078621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52805078629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26402539310 + 26402539311.

It is an arithmetic number, because the mean of its divisors is an integer number (26402539311).

Almost surely, 2^52805078621 is an apocalyptic number.

It is an amenable number.

52805078621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52805078621 is an equidigital number, since it uses as much as digits as its factorization.

52805078621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 52805078621 in words is "fifty-two billion, eight hundred five million, seventy-eight thousand, six hundred twenty-one".