57120510162721 has 2 divisors, whose sum is σ = 57120510162722. Its totient is φ = 57120510162720.

The previous prime is 57120510162697. The next prime is 57120510162731. The reversal of 57120510162721 is 12726101502175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44247627268321 + 12872882894400 = 6651889^2 + 3587880^2 .

It is a cyclic number.

It is not a de Polignac number, because 57120510162721 - 2¹⁵ = 57120510129953 is a prime.

It is not a weakly prime, because it can be changed into another prime (57120510162731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28560255081360 + 28560255081361.

It is an arithmetic number, because the mean of its divisors is an integer number (28560255081361).

Almost surely, 2^{57120510162721} is an apocalyptic number.

It is an amenable number.

57120510162721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57120510162721 is an equidigital number, since it uses as much as digits as its factorization.

57120510162721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 40.

Adding to 57120510162721 its reverse (12726101502175), we get a palindrome (69846611664896).

The spelling of 57120510162721 in words is "fifty-seven trillion, one hundred twenty billion, five hundred ten million, one hundred sixty-two thousand, seven hundred twenty-one".