999999757999999 has 2 divisors, whose sum is σ = 999999758000000. Its totient is φ = 999999757999998.

The previous prime is 999999757999997. The next prime is 999999758000017.

999999757999999 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 999999757999999 - 2¹ = 999999757999997 is a prime.

Together with 999999757999997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999757999993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999878999999 + 499999879000000.

It is an arithmetic number, because the mean of its divisors is an integer number (499999879000000).

Almost surely, 2^{999999757999999} is an apocalyptic number.

999999757999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999757999999 is an equidigital number, since it uses as much as digits as its factorization.

999999757999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69195236437845, while the sum is 127.

The spelling of 999999757999999 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, seven hundred fifty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".