57312121457 has 2 divisors, whose sum is σ = 57312121458. Its totient is φ = 57312121456.

The previous prime is 57312121439. The next prime is 57312121481. The reversal of 57312121457 is 75412121375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53568639601 + 3743481856 = 231449^2 + 61184^2 .

It is a cyclic number.

It is not a de Polignac number, because 57312121457 - 2¹⁰ = 57312120433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57312121457.

It is not a weakly prime, because it can be changed into another prime (57312721457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28656060728 + 28656060729.

It is an arithmetic number, because the mean of its divisors is an integer number (28656060729).

Almost surely, 2^57312121457 is an apocalyptic number.

It is an amenable number.

57312121457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57312121457 is an equidigital number, since it uses as much as digits as its factorization.

57312121457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 38.

The spelling of 57312121457 in words is "fifty-seven billion, three hundred twelve million, one hundred twenty-one thousand, four hundred fifty-seven".