4040632261 has 2 divisors, whose sum is σ = 4040632262. Its totient is φ = 4040632260.

The previous prime is 4040632259. The next prime is 4040632331. The reversal of 4040632261 is 1622360404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2624615361 + 1416016900 = 51231^2 + 37630^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040632261 - 2¹ = 4040632259 is a prime.

Together with 4040632259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040632201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020316130 + 2020316131.

It is an arithmetic number, because the mean of its divisors is an integer number (2020316131).

Almost surely, 2^4040632261 is an apocalyptic number.

It is an amenable number.

4040632261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040632261 is an equidigital number, since it uses as much as digits as its factorization.

4040632261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 4040632261 is about 63565.9677893761. The cubic root of 4040632261 is about 1592.7579286933.

Adding to 4040632261 its reverse (1622360404), we get a palindrome (5662992665).

The spelling of 4040632261 in words is "four billion, forty million, six hundred thirty-two thousand, two hundred sixty-one".