1689159766728 has 32 divisors (see below), whose sum is σ = 4826170762560. Its totient is φ = 482617076160.

The previous prime is 1689159766727. The next prime is 1689159766771. The reversal of 1689159766728 is 8276679519861.

It is a self number, because there is not a number n which added to its sum of digits gives 1689159766728.

It is not an unprimeable number, because it can be changed into a prime (1689159766727) 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, 5027261043 + ... + 5027261378.

It is an arithmetic number, because the mean of its divisors is an integer number (150817836330).

Almost surely, 2^{1689159766728} is an apocalyptic number.

It is an amenable number.

1689159766728 is an abundant number, since it is smaller than the sum of its proper divisors (3137010995832).

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

1689159766728 is a wasteful number, since it uses less digits than its factorization.

1689159766728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054522437 (or 10054522433 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 75.

The spelling of 1689159766728 in words is "one trillion, six hundred eighty-nine billion, one hundred fifty-nine million, seven hundred sixty-six thousand, seven hundred twenty-eight".