57457235261 has 2 divisors, whose sum is σ = 57457235262. Its totient is φ = 57457235260.

The previous prime is 57457235237. The next prime is 57457235263. The reversal of 57457235261 is 16253275475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48479672761 + 8977562500 = 220181^2 + 94750^2 .

It is a cyclic number.

It is not a de Polignac number, because 57457235261 - 2²⁶ = 57390126397 is a prime.

It is a Sophie Germain prime.

Together with 57457235263, it forms a pair of twin primes.

It is a Chen 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 (57457235263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28728617630 + 28728617631.

It is an arithmetic number, because the mean of its divisors is an integer number (28728617631).

Almost surely, 2^57457235261 is an apocalyptic number.

It is an amenable number.

57457235261 is a deficient number, since it is larger than the sum of its proper divisors (1).

57457235261 is an equidigital number, since it uses as much as digits as its factorization.

57457235261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764000, while the sum is 47.

The spelling of 57457235261 in words is "fifty-seven billion, four hundred fifty-seven million, two hundred thirty-five thousand, two hundred sixty-one".