216640028758 has 8 divisors (see below), whose sum is σ = 331874086752. Its totient is φ = 106015333176.

The previous prime is 216640028743. The next prime is 216640028797. The reversal of 216640028758 is 857820046612.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152340485 + ... + 1152340672.

It is an arithmetic number, because the mean of its divisors is an integer number (41484260844).

Almost surely, 2^216640028758 is an apocalyptic number.

216640028758 is a deficient number, since it is larger than the sum of its proper divisors (115234057994).

216640028758 is a wasteful number, since it uses less digits than its factorization.

216640028758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304681206.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 216640028758 in words is "two hundred sixteen billion, six hundred forty million, twenty-eight thousand, seven hundred fifty-eight".