52971725861 has 2 divisors, whose sum is σ = 52971725862. Its totient is φ = 52971725860.

The previous prime is 52971725837. The next prime is 52971725897. The reversal of 52971725861 is 16852717925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48002180836 + 4969545025 = 219094^2 + 70495^2 .

It is a cyclic number.

It is not a de Polignac number, because 52971725861 - 2⁶ = 52971725797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52971725761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26485862930 + 26485862931.

It is an arithmetic number, because the mean of its divisors is an integer number (26485862931).

Almost surely, 2^52971725861 is an apocalyptic number.

It is an amenable number.

52971725861 is a deficient number, since it is larger than the sum of its proper divisors (1).

52971725861 is an equidigital number, since it uses as much as digits as its factorization.

52971725861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 53.

The spelling of 52971725861 in words is "fifty-two billion, nine hundred seventy-one million, seven hundred twenty-five thousand, eight hundred sixty-one".