999988000057 has 2 divisors, whose sum is σ = 999988000058. Its totient is φ = 999988000056.

The previous prime is 999988000003. The next prime is 999988000093. The reversal of 999988000057 is 750000889999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500324216896 + 499663783161 = 707336^2 + 706869^2 .

It is an emirp because it is prime and its reverse (750000889999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999988000057 is a prime.

It is not a weakly prime, because it can be changed into another prime (999988001057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994000028 + 499994000029.

It is an arithmetic number, because the mean of its divisors is an integer number (499994000029).

Almost surely, 2^999988000057 is an apocalyptic number.

It is an amenable number.

999988000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

999988000057 is an equidigital number, since it uses as much as digits as its factorization.

999988000057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 64.

The spelling of 999988000057 in words is "nine hundred ninety-nine billion, nine hundred eighty-eight million, fifty-seven", and thus it is an aban number.