1689064506438 has 8 divisors (see below), whose sum is σ = 3378129012888. Its totient is φ = 563021502144.

The previous prime is 1689064506433. The next prime is 1689064506449. The reversal of 1689064506438 is 8346054609861.

It is a sphenic number, since it is the product of 3 distinct primes.

1689064506438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689064506433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140755375531 + ... + 140755375542.

It is an arithmetic number, because the mean of its divisors is an integer number (422266126611).

Almost surely, 2^{1689064506438} is an apocalyptic number.

1689064506438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1689064506438 is a wasteful number, since it uses less digits than its factorization.

1689064506438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281510751078.

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 1689064506438 in words is "one trillion, six hundred eighty-nine billion, sixty-four million, five hundred six thousand, four hundred thirty-eight".