222202768738661 has 4 divisors (see below), whose sum is σ = 222267873567372. Its totient is φ = 222137663909952.

The previous prime is 222202768738637. The next prime is 222202768738693. The reversal of 222202768738661 is 166837867202222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 102553495996900 + 119649272741761 = 10126870^2 + 10938431^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202768738661 - 2¹⁰ = 222202768737637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222202768738594 and 222202768738603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202768738361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32552409236 + ... + 32552416061.

It is an arithmetic number, because the mean of its divisors is an integer number (55566968391843).

Almost surely, 2^{222202768738661} is an apocalyptic number.

It is an amenable number.

222202768738661 is a deficient number, since it is larger than the sum of its proper divisors (65104828711).

222202768738661 is an equidigital number, since it uses as much as digits as its factorization.

222202768738661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65104828710.

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 222202768738661 in words is "two hundred twenty-two trillion, two hundred two billion, seven hundred sixty-eight million, seven hundred thirty-eight thousand, six hundred sixty-one".