1689249868872 has 16 divisors (see below), whose sum is σ = 4223124672240. Its totient is φ = 563083289616.

The previous prime is 1689249868811. The next prime is 1689249868913. The reversal of 1689249868872 is 2788689429861.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35192705578 + ... + 35192705625.

It is an arithmetic number, because the mean of its divisors is an integer number (263945292015).

Almost surely, 2^{1689249868872} is an apocalyptic number.

1689249868872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1689249868872 is an abundant number, since it is smaller than the sum of its proper divisors (2533874803368).

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

1689249868872 is a wasteful number, since it uses less digits than its factorization.

1689249868872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70385411212 (or 70385411208 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 78.

The spelling of 1689249868872 in words is "one trillion, six hundred eighty-nine billion, two hundred forty-nine million, eight hundred sixty-eight thousand, eight hundred seventy-two".