1688811198249 has 16 divisors (see below), whose sum is σ = 2574551902208. Its totient is φ = 964612977552.

The previous prime is 1688811198241. The next prime is 1688811198329. The reversal of 1688811198249 is 9428911188861.

It is a happy number.

It is not a de Polignac number, because 1688811198249 - 2³ = 1688811198241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1688811198249.

It is not an unprimeable number, because it can be changed into a prime (1688811198241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17533867 + ... + 17629920.

It is an arithmetic number, because the mean of its divisors is an integer number (160909493888).

Almost surely, 2^{1688811198249} is an apocalyptic number.

It is an amenable number.

1688811198249 is a deficient number, since it is larger than the sum of its proper divisors (885740703959).

1688811198249 is a wasteful number, since it uses less digits than its factorization.

1688811198249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35166084.

The product of its digits is 15925248, while the sum is 66.

The spelling of 1688811198249 in words is "one trillion, six hundred eighty-eight billion, eight hundred eleven million, one hundred ninety-eight thousand, two hundred forty-nine".