12517879778950 has 576 divisors, whose sum is σ = 31422748815360. Its totient is φ = 3617961984000.

The previous prime is 12517879778927. The next prime is 12517879778977. The reversal of 12517879778950 is 5987797871521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 8699012331 + ... + 8699013769.

It is an arithmetic number, because the mean of its divisors is an integer number (54553383360).

Almost surely, 2^{12517879778950} is an apocalyptic number.

12517879778950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12517879778950 is an abundant number, since it is smaller than the sum of its proper divisors (18904869036410).

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

12517879778950 is a wasteful number, since it uses less digits than its factorization.

12517879778950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 622339200, while the sum is 76.

The spelling of 12517879778950 in words is "twelve trillion, five hundred seventeen billion, eight hundred seventy-nine million, seven hundred seventy-eight thousand, nine hundred fifty".