2265716367778 has 4 divisors (see below), whose sum is σ = 3398574551670. Its totient is φ = 1132858183888.

The previous prime is 2265716367773. The next prime is 2265716367779. The reversal of 2265716367778 is 8777636175622.

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

It can be written as a sum of positive squares in only one way, i.e., 1982173962609 + 283542405169 = 1407897^2 + 532487^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2265716367773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566429091943 + ... + 566429091946.

Almost surely, 2^{2265716367778} is an apocalyptic number.

2265716367778 is a deficient number, since it is larger than the sum of its proper divisors (1132858183892).

2265716367778 is a wasteful number, since it uses less digits than its factorization.

2265716367778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132858183891.

The product of its digits is 248935680, while the sum is 67.

The spelling of 2265716367778 in words is "two trillion, two hundred sixty-five billion, seven hundred sixteen million, three hundred sixty-seven thousand, seven hundred seventy-eight".