57404066261 has 2 divisors, whose sum is σ = 57404066262. Its totient is φ = 57404066260.

The previous prime is 57404066227. The next prime is 57404066281. The reversal of 57404066261 is 16266040475.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55982399236 + 1421667025 = 236606^2 + 37705^2 .

It is a cyclic number.

It is not a de Polignac number, because 57404066261 - 2²⁶ = 57336957397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57404066281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28702033130 + 28702033131.

It is an arithmetic number, because the mean of its divisors is an integer number (28702033131).

Almost surely, 2^57404066261 is an apocalyptic number.

It is an amenable number.

57404066261 is a deficient number, since it is larger than the sum of its proper divisors (1).

57404066261 is an equidigital number, since it uses as much as digits as its factorization.

57404066261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 57404066261 in words is "fifty-seven billion, four hundred four million, sixty-six thousand, two hundred sixty-one".