4011261643 has 4 divisors (see below), whose sum is σ = 4149581040. Its totient is φ = 3872942248.

The previous prime is 4011261641. The next prime is 4011261713. The reversal of 4011261643 is 3461621104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4011261643 - 2¹ = 4011261641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4011261641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69159655 + ... + 69159712.

It is an arithmetic number, because the mean of its divisors is an integer number (1037395260).

Almost surely, 2^4011261643 is an apocalyptic number.

4011261643 is a deficient number, since it is larger than the sum of its proper divisors (138319397).

4011261643 is a wasteful number, since it uses less digits than its factorization.

4011261643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138319396.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4011261643 is about 63334.5217318328. The cubic root of 4011261643 is about 1588.8893847469.

Adding to 4011261643 its reverse (3461621104), we get a palindrome (7472882747).

The spelling of 4011261643 in words is "four billion, eleven million, two hundred sixty-one thousand, six hundred forty-three".