4023605781 has 48 divisors (see below), whose sum is σ = 6693064560. Its totient is φ = 2307225600.

The previous prime is 4023605779. The next prime is 4023605791. The reversal of 4023605781 is 1875063204.

4023605781 is a `hidden beast` number, since 4 + 0 + 23 + 60 + 578 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 58384881 + 3965220900 = 7641^2 + 62970^2 .

It is not a de Polignac number, because 4023605781 - 2¹ = 4023605779 is a prime.

It is a super-2 number, since 2×4023605781² = 32378806961793239922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023605701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190875 + ... + 210903.

It is an arithmetic number, because the mean of its divisors is an integer number (139438845).

Almost surely, 2^4023605781 is an apocalyptic number.

It is an amenable number.

4023605781 is a deficient number, since it is larger than the sum of its proper divisors (2669458779).

4023605781 is a wasteful number, since it uses less digits than its factorization.

4023605781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20166 (or 20163 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 4023605781 is about 63431.8987655265. The cubic root of 4023605781 is about 1590.5175827719.

Adding to 4023605781 its reverse (1875063204), we get a palindrome (5898668985).

The spelling of 4023605781 in words is "four billion, twenty-three million, six hundred five thousand, seven hundred eighty-one".