222061806738 has 54 divisors (see below), whose sum is σ = 486065485269. Its totient is φ = 73269540144.

The previous prime is 222061806719. The next prime is 222061806763. The reversal of 222061806738 is 837608160222.

222061806738 is a `hidden beast` number, since 2 + 2 + 20 + 618 + 0 + 6 + 7 + 3 + 8 = 666.

222061806738 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 213081022449 + 8980784289 = 461607^2 + 94767^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333213.

It is a super-2 number, since 2×222061806738² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222061806693 and 222061806702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 217920793 + ... + 217921811.

Almost surely, 2^222061806738 is an apocalyptic number.

222061806738 is an abundant number, since it is smaller than the sum of its proper divisors (264003678531).

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

222061806738 is an equidigital number, since it uses as much as digits as its factorization.

222061806738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 222061806738 in words is "two hundred twenty-two billion, sixty-one million, eight hundred six thousand, seven hundred thirty-eight".