4040656643 has 2 divisors, whose sum is σ = 4040656644. Its totient is φ = 4040656642.

The previous prime is 4040656639. The next prime is 4040656657. The reversal of 4040656643 is 3466560404.

It is a happy number.

4040656643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4040656643 - 2² = 4040656639 is a prime.

It is a super-2 number, since 2×4040656643² = 32653812213240058898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4040656597 and 4040656606.

It is not a weakly prime, because it can be changed into another prime (4040656673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020328321 + 2020328322.

It is an arithmetic number, because the mean of its divisors is an integer number (2020328322).

Almost surely, 2^4040656643 is an apocalyptic number.

4040656643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040656643 is an equidigital number, since it uses as much as digits as its factorization.

4040656643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 4040656643 is about 63566.1595741004. The cubic root of 4040656643 is about 1592.7611323624.

The spelling of 4040656643 in words is "four billion, forty million, six hundred fifty-six thousand, six hundred forty-three".