252909278537 has 2 divisors, whose sum is σ = 252909278538. Its totient is φ = 252909278536.

The previous prime is 252909278497. The next prime is 252909278539. The reversal of 252909278537 is 735872909252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252426861241 + 482417296 = 502421^2 + 21964^2 .

It is a cyclic number.

It is not a de Polignac number, because 252909278537 - 2¹² = 252909274441 is a prime.

Together with 252909278539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252909278539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126454639268 + 126454639269.

It is an arithmetic number, because the mean of its divisors is an integer number (126454639269).

Almost surely, 2^252909278537 is an apocalyptic number.

It is an amenable number.

252909278537 is a deficient number, since it is larger than the sum of its proper divisors (1).

252909278537 is an equidigital number, since it uses as much as digits as its factorization.

252909278537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 252909278537 in words is "two hundred fifty-two billion, nine hundred nine million, two hundred seventy-eight thousand, five hundred thirty-seven".