99748691802857 has 2 divisors, whose sum is σ = 99748691802858. Its totient is φ = 99748691802856.

The previous prime is 99748691802847. The next prime is 99748691802931. The reversal of 99748691802857 is 75820819684799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82540332099241 + 17208359703616 = 9085171^2 + 4148296^2 .

It is a cyclic number.

It is not a de Polignac number, because 99748691802857 - 2²² = 99748687608553 is a prime.

It is not a weakly prime, because it can be changed into another prime (99748691802847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49874345901428 + 49874345901429.

It is an arithmetic number, because the mean of its divisors is an integer number (49874345901429).

Almost surely, 2^{99748691802857} is an apocalyptic number.

It is an amenable number.

99748691802857 is a deficient number, since it is larger than the sum of its proper divisors (1).

99748691802857 is an equidigital number, since it uses as much as digits as its factorization.

99748691802857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4389396480, while the sum is 83.

The spelling of 99748691802857 in words is "ninety-nine trillion, seven hundred forty-eight billion, six hundred ninety-one million, eight hundred two thousand, eight hundred fifty-seven".