216215426078 has 8 divisors (see below), whose sum is σ = 324328368168. Its totient is φ = 108105970024.

The previous prime is 216215426051. The next prime is 216215426099. The reversal of 216215426078 is 870624512612.

216215426078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216215426078² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 710501 + ... + 968112.

It is an arithmetic number, because the mean of its divisors is an integer number (40541046021).

Almost surely, 2^216215426078 is an apocalyptic number.

216215426078 is a deficient number, since it is larger than the sum of its proper divisors (108112942090).

216215426078 is a wasteful number, since it uses less digits than its factorization.

216215426078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743018.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 216215426078 in words is "two hundred sixteen billion, two hundred fifteen million, four hundred twenty-six thousand, seventy-eight".