4053945681 has 12 divisors (see below), whose sum is σ = 6200152452. Its totient is φ = 2543652096.

The previous prime is 4053945653. The next prime is 4053945683. The reversal of 4053945681 is 1865493504.

It can be written as a sum of positive squares in 2 ways, for example, as 1170255681 + 2883690000 = 34209^2 + 53700^2 .

It is not a de Polignac number, because 4053945681 - 2¹⁸ = 4053683537 is a prime.

It is a super-2 number, since 2×4053945681² = 32868951168997107522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4053945683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13248036 + ... + 13248341.

It is an arithmetic number, because the mean of its divisors is an integer number (516679371).

Almost surely, 2^4053945681 is an apocalyptic number.

It is an amenable number.

4053945681 is a deficient number, since it is larger than the sum of its proper divisors (2146206771).

4053945681 is a wasteful number, since it uses less digits than its factorization.

4053945681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26496400 (or 26496397 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 4053945681 is about 63670.6029577230. The cubic root of 4053945681 is about 1594.5053291844.

The spelling of 4053945681 in words is "four billion, fifty-three million, nine hundred forty-five thousand, six hundred eighty-one".