2099817668057 has 4 divisors (see below), whose sum is σ = 2099823907380. Its totient is φ = 2099811428736.

The previous prime is 2099817668029. The next prime is 2099817668063. The reversal of 2099817668057 is 7508667189902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1457184565321 + 642633102736 = 1207139^2 + 801644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2099817668057 is a prime.

It is a super-3 number, since 3×2099817668057³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2099817668077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584208 + ... + 3298145.

It is an arithmetic number, because the mean of its divisors is an integer number (524955976845).

Almost surely, 2^{2099817668057} is an apocalyptic number.

It is an amenable number.

2099817668057 is a deficient number, since it is larger than the sum of its proper divisors (6239323).

2099817668057 is an equidigital number, since it uses as much as digits as its factorization.

2099817668057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6239322.

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 2099817668057 in words is "two trillion, ninety-nine billion, eight hundred seventeen million, six hundred sixty-eight thousand, fifty-seven".