4448040781 has 2 divisors, whose sum is σ = 4448040782. Its totient is φ = 4448040780.

The previous prime is 4448040767. The next prime is 4448040869. The reversal of 4448040781 is 1870408444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3826535881 + 621504900 = 61859^2 + 24930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4448040781 - 2⁵ = 4448040749 is a prime.

It is a super-2 number, since 2×4448040781² = 39570133578878179922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4448040721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224020390 + 2224020391.

It is an arithmetic number, because the mean of its divisors is an integer number (2224020391).

Almost surely, 2^4448040781 is an apocalyptic number.

It is an amenable number.

4448040781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448040781 is an equidigital number, since it uses as much as digits as its factorization.

4448040781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 114688, while the sum is 40.

The square root of 4448040781 is about 66693.6337366619. The cubic root of 4448040781 is about 1644.5847297585.

The spelling of 4448040781 in words is "four billion, four hundred forty-eight million, forty thousand, seven hundred eighty-one".