57516113121209 has 2 divisors, whose sum is σ = 57516113121210. Its totient is φ = 57516113121208.

The previous prime is 57516113121197. The next prime is 57516113121223. The reversal of 57516113121209 is 90212131161575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55254915223225 + 2261197897984 = 7433365^2 + 1503728^2 .

It is a cyclic number.

It is not a de Polignac number, because 57516113121209 - 2²⁸ = 57515844685753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57516113121209.

It is not a weakly prime, because it can be changed into another prime (57516113121809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28758056560604 + 28758056560605.

It is an arithmetic number, because the mean of its divisors is an integer number (28758056560605).

Almost surely, 2^{57516113121209} is an apocalyptic number.

It is an amenable number.

57516113121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

57516113121209 is an equidigital number, since it uses as much as digits as its factorization.

57516113121209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 57516113121209 in words is "fifty-seven trillion, five hundred sixteen billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred nine".