57138021049 has 2 divisors, whose sum is σ = 57138021050. Its totient is φ = 57138021048.

The previous prime is 57138021013. The next prime is 57138021053. The reversal of 57138021049 is 94012083175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33181172649 + 23956848400 = 182157^2 + 154780^2 .

It is a cyclic number.

It is not a de Polignac number, because 57138021049 - 2¹³ = 57138012857 is a prime.

It is not a weakly prime, because it can be changed into another prime (57138022049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28569010524 + 28569010525.

It is an arithmetic number, because the mean of its divisors is an integer number (28569010525).

Almost surely, 2^57138021049 is an apocalyptic number.

It is an amenable number.

57138021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

57138021049 is an equidigital number, since it uses as much as digits as its factorization.

57138021049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 57138021049 in words is "fifty-seven billion, one hundred thirty-eight million, twenty-one thousand, forty-nine".