206221211115264 has 54 divisors (see below), whose sum is σ = 594586590908856. Its totient is φ = 68740403704320.

The previous prime is 206221211115263. The next prime is 206221211115277. The reversal of 206221211115264 is 462511112122602.

206221211115264 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 2 + 12 + 1 + 111 + 526 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206221211115263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44752864692 + ... + 44752869299.

Almost surely, 2^{206221211115264} is an apocalyptic number.

206221211115264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206221211115264 is an abundant number, since it is smaller than the sum of its proper divisors (388365379793592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206221211115264 is an equidigital number, since it uses as much as digits as its factorization.

206221211115264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89505734013 (or 89505733996 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

Adding to 206221211115264 its reverse (462511112122602), we get a palindrome (668732323237866).

The spelling of 206221211115264 in words is "two hundred six trillion, two hundred twenty-one billion, two hundred eleven million, one hundred fifteen thousand, two hundred sixty-four".