216111310775 has 12 divisors (see below), whose sum is σ = 270989017200. Its totient is φ = 170946473280.

The previous prime is 216111310741. The next prime is 216111310783. The reversal of 216111310775 is 577013111612.

It is not a de Polignac number, because 216111310775 - 2⁶ = 216111310711 is a prime.

It is a super-2 number, since 2×216111310775² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48562115 + ... + 48566564.

It is an arithmetic number, because the mean of its divisors is an integer number (22582418100).

Almost surely, 2^216111310775 is an apocalyptic number.

216111310775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216111310775 is a deficient number, since it is larger than the sum of its proper divisors (54877706425).

216111310775 is an equidigital number, since it uses as much as digits as its factorization.

216111310775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97128778 (or 97128773 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 35.

The spelling of 216111310775 in words is "two hundred sixteen billion, one hundred eleven million, three hundred ten thousand, seven hundred seventy-five".