2323865781 has 20 divisors (see below), whose sum is σ = 3489099372. Its totient is φ = 1541369088.

The previous prime is 2323865767. The next prime is 2323865783. The reversal of 2323865781 is 1875683232.

It can be written as a sum of positive squares in 2 ways, for example, as 1302488100 + 1021377681 = 36090^2 + 31959^2 .

It is not a de Polignac number, because 2323865781 - 2⁵ = 2323865749 is a prime.

It is a super-2 number, since 2×2323865781² = 10800704336205479922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2323865783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56860 + ... + 88773.

Almost surely, 2^2323865781 is an apocalyptic number.

It is an amenable number.

2323865781 is a deficient number, since it is larger than the sum of its proper divisors (1165233591).

2323865781 is a wasteful number, since it uses less digits than its factorization.

2323865781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145842 (or 145833 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2323865781 is about 48206.4910670752. The cubic root of 2323865781 is about 1324.5560693422.

The spelling of 2323865781 in words is "two billion, three hundred twenty-three million, eight hundred sixty-five thousand, seven hundred eighty-one".