2265782668578 has 160 divisors (see below), whose sum is σ = 6011597813760. Its totient is φ = 628794109440.

The previous prime is 2265782668571. The next prime is 2265782668601. The reversal of 2265782668578 is 8758662875622.

2265782668578 is a `hidden beast` number, since 2 + 26 + 5 + 7 + 8 + 26 + 6 + 8 + 578 = 666.

It is a super-2 number, since 2×2265782668578² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2265782668571) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2557018 + ... + 3327146.

It is an arithmetic number, because the mean of its divisors is an integer number (37572486336).

Almost surely, 2^{2265782668578} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2265782668578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3005798906880).

2265782668578 is an abundant number, since it is smaller than the sum of its proper divisors (3745815145182).

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

2265782668578 is a wasteful number, since it uses less digits than its factorization.

2265782668578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770294 (or 770285 counting only the distinct ones).

The product of its digits is 1083801600, while the sum is 72.

The spelling of 2265782668578 in words is "two trillion, two hundred sixty-five billion, seven hundred eighty-two million, six hundred sixty-eight thousand, five hundred seventy-eight".