57456669397 has 2 divisors, whose sum is σ = 57456669398. Its totient is φ = 57456669396.

The previous prime is 57456669293. The next prime is 57456669401. The reversal of 57456669397 is 79396665475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54005576881 + 3451092516 = 232391^2 + 58746^2 .

It is a cyclic number.

It is not a de Polignac number, because 57456669397 - 2³¹ = 55309185749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57456669097) 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, 28728334698 + 28728334699.

It is an arithmetic number, because the mean of its divisors is an integer number (28728334699).

Almost surely, 2^57456669397 is an apocalyptic number.

It is an amenable number.

57456669397 is a deficient number, since it is larger than the sum of its proper divisors (1).

57456669397 is an equidigital number, since it uses as much as digits as its factorization.

57456669397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 257191200, while the sum is 67.

The spelling of 57456669397 in words is "fifty-seven billion, four hundred fifty-six million, six hundred sixty-nine thousand, three hundred ninety-seven".