1797992986889 has 16 divisors (see below), whose sum is σ = 1964858668224. Its totient is φ = 1631697177600.

The previous prime is 1797992986871. The next prime is 1797992986897. The reversal of 1797992986889 is 9886892997971.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1797992986889 - 2⁸ = 1797992986633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1797992986798 and 1797992986807.

It is not an unprimeable number, because it can be changed into a prime (1797992986289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31382309 + ... + 31439549.

It is an arithmetic number, because the mean of its divisors is an integer number (122803666764).

Almost surely, 2^{1797992986889} is an apocalyptic number.

It is an amenable number.

1797992986889 is a deficient number, since it is larger than the sum of its proper divisors (166865681335).

1797992986889 is a wasteful number, since it uses less digits than its factorization.

1797992986889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62168.

The product of its digits is 17777055744, while the sum is 92.

The spelling of 1797992986889 in words is "one trillion, seven hundred ninety-seven billion, nine hundred ninety-two million, nine hundred eighty-six thousand, eight hundred eighty-nine".