216980972725 has 12 divisors (see below), whose sum is σ = 293516079840. Its totient is φ = 157804343600.

The previous prime is 216980972717. The next prime is 216980972729. The reversal of 216980972725 is 527279089612.

It is not a de Polignac number, because 216980972725 - 2³ = 216980972717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216980972725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216980972729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394510585 + ... + 394511134.

It is an arithmetic number, because the mean of its divisors is an integer number (24459673320).

Almost surely, 2^216980972725 is an apocalyptic number.

216980972725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216980972725 is a deficient number, since it is larger than the sum of its proper divisors (76535107115).

216980972725 is a wasteful number, since it uses less digits than its factorization.

216980972725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789021740 (or 789021735 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 216980972725 in words is "two hundred sixteen billion, nine hundred eighty million, nine hundred seventy-two thousand, seven hundred twenty-five".