1797992986890 has 32 divisors (see below), whose sum is σ = 4318207225920. Its totient is φ = 479128790144.

The previous prime is 1797992986871. The next prime is 1797992986897. The reversal of 1797992986890 is 986892997971.

It is not an unprimeable number, because it can be changed into a prime (1797992986897) 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, 20956875 + ... + 21042494.

It is an arithmetic number, because the mean of its divisors is an integer number (134943975810).

Almost surely, 2^{1797992986890} is an apocalyptic number.

1797992986890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1797992986890 is an abundant number, since it is smaller than the sum of its proper divisors (2520214239030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1797992986890 is a wasteful number, since it uses less digits than its factorization.

1797992986890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42000806.

The product of its (nonzero) digits is 2222131968, while the sum is 84.

The spelling of 1797992986890 in words is "one trillion, seven hundred ninety-seven billion, nine hundred ninety-two million, nine hundred eighty-six thousand, eight hundred ninety".