216706771138040 has 32 divisors (see below), whose sum is σ = 488161853232480. Its totient is φ = 86581087446912.

The previous prime is 216706771138007. The next prime is 216706771138051. The reversal of 216706771138040 is 40831177607612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3175621964 + ... + 3175690203.

It is an arithmetic number, because the mean of its divisors is an integer number (15255057913515).

Almost surely, 2^{216706771138040} is an apocalyptic number.

216706771138040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216706771138040 is an abundant number, since it is smaller than the sum of its proper divisors (271455082094440).

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

216706771138040 is a wasteful number, since it uses less digits than its factorization.

216706771138040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351313031 (or 6351313027 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 216706771138040 in words is "two hundred sixteen trillion, seven hundred six billion, seven hundred seventy-one million, one hundred thirty-eight thousand, forty".