40442930881 has 2 divisors, whose sum is σ = 40442930882. Its totient is φ = 40442930880.

The previous prime is 40442930837. The next prime is 40442930917. The reversal of 40442930881 is 18803924404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37861376400 + 2581554481 = 194580^2 + 50809^2 .

It is a cyclic number.

It is not a de Polignac number, because 40442930881 - 2¹¹ = 40442928833 is a prime.

It is a super-2 number, since 2×40442930881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40442930081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20221465440 + 20221465441.

It is an arithmetic number, because the mean of its divisors is an integer number (20221465441).

Almost surely, 2^40442930881 is an apocalyptic number.

It is an amenable number.

40442930881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40442930881 is an equidigital number, since it uses as much as digits as its factorization.

40442930881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 40442930881 in words is "forty billion, four hundred forty-two million, nine hundred thirty thousand, eight hundred eighty-one".