216206259755 has 4 divisors (see below), whose sum is σ = 259447511712. Its totient is φ = 172965007800.

The previous prime is 216206259721. The next prime is 216206259809. The reversal of 216206259755 is 557952602612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216206259755 - 2⁶ = 216206259691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21620625971 + ... + 21620625980.

It is an arithmetic number, because the mean of its divisors is an integer number (64861877928).

Almost surely, 2^216206259755 is an apocalyptic number.

216206259755 is a deficient number, since it is larger than the sum of its proper divisors (43241251957).

216206259755 is an equidigital number, since it uses as much as digits as its factorization.

216206259755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43241251956.

The product of its (nonzero) digits is 2268000, while the sum is 50.

The spelling of 216206259755 in words is "two hundred sixteen billion, two hundred six million, two hundred fifty-nine thousand, seven hundred fifty-five".