216377281724709 has 36 divisors (see below), whose sum is σ = 354198686819904. Its totient is φ = 117136573536528.

The previous prime is 216377281724699. The next prime is 216377281724717. The reversal of 216377281724709 is 907427182773612.

It is not a de Polignac number, because 216377281724709 - 2⁷ = 216377281724581 is a prime.

It is a super-2 number, since 2×216377281724709² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 216377281724709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216377281724789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2038664797 + ... + 2038770930.

It is an arithmetic number, because the mean of its divisors is an integer number (9838852411664).

Almost surely, 2^{216377281724709} is an apocalyptic number.

It is an amenable number.

216377281724709 is a deficient number, since it is larger than the sum of its proper divisors (137821405095195).

216377281724709 is a wasteful number, since it uses less digits than its factorization.

216377281724709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077435782 (or 4077435756 counting only the distinct ones).

The product of its (nonzero) digits is 99574272, while the sum is 66.

The spelling of 216377281724709 in words is "two hundred sixteen trillion, three hundred seventy-seven billion, two hundred eighty-one million, seven hundred twenty-four thousand, seven hundred nine".