289289209506 has 32 divisors (see below), whose sum is σ = 637304398848. Its totient is φ = 86812293840.

The previous prime is 289289209441. The next prime is 289289209513. The reversal of 289289209506 is 605902982982.

It is a self number, because there is not a number n which added to its sum of digits gives 289289209506.

It is an unprimeable number.

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, 21270726 + ... + 21284321.

It is an arithmetic number, because the mean of its divisors is an integer number (19915762464).

Almost surely, 2^289289209506 is an apocalyptic number.

289289209506 is an abundant number, since it is smaller than the sum of its proper divisors (348015189342).

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

289289209506 is a wasteful number, since it uses less digits than its factorization.

289289209506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42555166.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 289289209506 in words is "two hundred eighty-nine billion, two hundred eighty-nine million, two hundred nine thousand, five hundred six".