2190568722568 has 8 divisors (see below), whose sum is σ = 4107316354830. Its totient is φ = 1095284361280.

The previous prime is 2190568722541. The next prime is 2190568722569. The reversal of 2190568722568 is 8652278650912.

It can be written as a sum of positive squares in only one way, i.e., 1233259112484 + 957309610084 = 1110522^2 + 978422^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2190568722569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136910545153 + ... + 136910545168.

Almost surely, 2^{2190568722568} is an apocalyptic number.

It is an amenable number.

2190568722568 is a deficient number, since it is larger than the sum of its proper divisors (1916747632262).

2190568722568 is a wasteful number, since it uses less digits than its factorization.

2190568722568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273821090327 (or 273821090323 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 2190568722568 in words is "two trillion, one hundred ninety billion, five hundred sixty-eight million, seven hundred twenty-two thousand, five hundred sixty-eight".