12989458978950 has 48 divisors (see below), whose sum is σ = 32214147068880. Its totient is φ = 3463824673920.

The previous prime is 12989458978933. The next prime is 12989458979059. The reversal of 12989458978950 is 5987985498921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19933692 + ... + 20575008.

It is an arithmetic number, because the mean of its divisors is an integer number (671128063935).

Almost surely, 2^{12989458978950} is an apocalyptic number.

12989458978950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12989458978950 is an abundant number, since it is smaller than the sum of its proper divisors (19224688089930).

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

12989458978950 is a wasteful number, since it uses less digits than its factorization.

12989458978950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776361 (or 776356 counting only the distinct ones).

The product of its (nonzero) digits is 4702924800, while the sum is 84.

The spelling of 12989458978950 in words is "twelve trillion, nine hundred eighty-nine billion, four hundred fifty-eight million, nine hundred seventy-eight thousand, nine hundred fifty".