999900001009957 has 2 divisors, whose sum is σ = 999900001009958. Its totient is φ = 999900001009956.

The previous prime is 999900001009939. The next prime is 999900001010017. The reversal of 999900001009957 is 759900100009999.

999900001009957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902041095932001 + 97858905077956 = 30033999^2 + 9892366^2 .

It is a cyclic number.

It is not a de Polignac number, because 999900001009957 - 2⁴⁷ = 859162512654629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999900001009892 and 999900001009901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999900001003957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499950000504978 + 499950000504979.

It is an arithmetic number, because the mean of its divisors is an integer number (499950000504979).

Almost surely, 2^{999900001009957} is an apocalyptic number.

It is an amenable number.

999900001009957 is a deficient number, since it is larger than the sum of its proper divisors (1).

999900001009957 is an equidigital number, since it uses as much as digits as its factorization.

999900001009957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18600435, while the sum is 67.

The spelling of 999900001009957 in words is "nine hundred ninety-nine trillion, nine hundred billion, one million, nine thousand, nine hundred fifty-seven".