57444644489 has 2 divisors, whose sum is σ = 57444644490. Its totient is φ = 57444644488.

The previous prime is 57444644443. The next prime is 57444644599. The reversal of 57444644489 is 98444644475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33393907600 + 24050736889 = 182740^2 + 155083^2 .

It is a cyclic number.

It is not a de Polignac number, because 57444644489 - 2²⁸ = 57176209033 is a prime.

It is a super-2 number, since 2×57444644489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57444644689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28722322244 + 28722322245.

It is an arithmetic number, because the mean of its divisors is an integer number (28722322245).

Almost surely, 2^57444644489 is an apocalyptic number.

It is an amenable number.

57444644489 is a deficient number, since it is larger than the sum of its proper divisors (1).

57444644489 is an equidigital number, since it uses as much as digits as its factorization.

57444644489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61931520, while the sum is 59.

The spelling of 57444644489 in words is "fifty-seven billion, four hundred forty-four million, six hundred forty-four thousand, four hundred eighty-nine".