52645278509 has 2 divisors, whose sum is σ = 52645278510. Its totient is φ = 52645278508.

The previous prime is 52645278457. The next prime is 52645278551. The reversal of 52645278509 is 90587254625.

It is a happy number.

52645278509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39557232100 + 13088046409 = 198890^2 + 114403^2 .

It is a cyclic number.

It is not a de Polignac number, because 52645278509 - 2¹² = 52645274413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52645278589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26322639254 + 26322639255.

It is an arithmetic number, because the mean of its divisors is an integer number (26322639255).

Almost surely, 2^52645278509 is an apocalyptic number.

It is an amenable number.

52645278509 is a deficient number, since it is larger than the sum of its proper divisors (1).

52645278509 is an equidigital number, since it uses as much as digits as its factorization.

52645278509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048000, while the sum is 53.

The spelling of 52645278509 in words is "fifty-two billion, six hundred forty-five million, two hundred seventy-eight thousand, five hundred nine".