57444718949 has 2 divisors, whose sum is σ = 57444718950. Its totient is φ = 57444718948.

The previous prime is 57444718943. The next prime is 57444718963. The reversal of 57444718949 is 94981744475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44778792100 + 12665926849 = 211610^2 + 112543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57444718949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57444718891 and 57444718900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57444718943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28722359474 + 28722359475.

It is an arithmetic number, because the mean of its divisors is an integer number (28722359475).

Almost surely, 2^57444718949 is an apocalyptic number.

It is an amenable number.

57444718949 is a deficient number, since it is larger than the sum of its proper divisors (1).

57444718949 is an equidigital number, since it uses as much as digits as its factorization.

57444718949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 62.

The spelling of 57444718949 in words is "fifty-seven billion, four hundred forty-four million, seven hundred eighteen thousand, nine hundred forty-nine".