216855338835 has 16 divisors (see below), whose sum is σ = 350039062944. Its totient is φ = 114632673792.

The previous prime is 216855338773. The next prime is 216855338867. The reversal of 216855338835 is 538833558612.

It is not a de Polignac number, because 216855338835 - 2²⁶ = 216788229971 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63967432 + ... + 63970821.

It is an arithmetic number, because the mean of its divisors is an integer number (21877441434).

Almost surely, 2^216855338835 is an apocalyptic number.

216855338835 is a deficient number, since it is larger than the sum of its proper divisors (133183724109).

216855338835 is a wasteful number, since it uses less digits than its factorization.

216855338835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127938374.

The product of its digits is 20736000, while the sum is 57.

The spelling of 216855338835 in words is "two hundred sixteen billion, eight hundred fifty-five million, three hundred thirty-eight thousand, eight hundred thirty-five".