2440245991 has 2 divisors, whose sum is σ = 2440245992. Its totient is φ = 2440245990.

The previous prime is 2440245979. The next prime is 2440246031. The reversal of 2440245991 is 1995420442.

It is an a-pointer prime, because the next prime (2440246031) can be obtained adding 2440245991 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2440245991 - 2¹⁹ = 2439721703 is a prime.

It is a super-3 number, since 3×2440245991³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2440245901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220122995 + 1220122996.

It is an arithmetic number, because the mean of its divisors is an integer number (1220122996).

Almost surely, 2^2440245991 is an apocalyptic number.

2440245991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440245991 is an equidigital number, since it uses as much as digits as its factorization.

2440245991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 2440245991 is about 49398.8460492753. The cubic root of 2440245991 is about 1346.3083395456.

The spelling of 2440245991 in words is "two billion, four hundred forty million, two hundred forty-five thousand, nine hundred ninety-one".