1689021881080 has 32 divisors (see below), whose sum is σ = 3965529636000. Its totient is φ = 646234458496.

The previous prime is 1689021881033. The next prime is 1689021881081. The reversal of 1689021881080 is 801881209861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689021881081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917945755 + ... + 917947594.

It is an arithmetic number, because the mean of its divisors is an integer number (123922801125).

Almost surely, 2^{1689021881080} is an apocalyptic number.

1689021881080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689021881080 is an abundant number, since it is smaller than the sum of its proper divisors (2276507754920).

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

1689021881080 is a wasteful number, since it uses less digits than its factorization.

1689021881080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835893383 (or 1835893379 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 52.

The spelling of 1689021881080 in words is "one trillion, six hundred eighty-nine billion, twenty-one million, eight hundred eighty-one thousand, eighty".