12989673450 has 72 divisors (see below), whose sum is σ = 37583472108. Its totient is φ = 3197456640.

The previous prime is 12989673439. The next prime is 12989673479. The reversal of 12989673450 is 5437698921.

12989673450 is a `hidden beast` number, since 1 + 298 + 9 + 6 + 7 + 345 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1549445769 + 11440227681 = 39363^2 + 106959^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1104379 + ... + 1116078.

It is a 1-persistent number, because it is pandigital, but 2⋅12989673450 = 25979346900 is not.

Almost surely, 2^12989673450 is an apocalyptic number.

12989673450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12989673450 is an abundant number, since it is smaller than the sum of its proper divisors (24593798658).

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

12989673450 is a wasteful number, since it uses less digits than its factorization.

12989673450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220488 (or 2220480 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 12989673450 in words is "twelve billion, nine hundred eighty-nine million, six hundred seventy-three thousand, four hundred fifty".