9040491881 has 2 divisors, whose sum is σ = 9040491882. Its totient is φ = 9040491880.

The previous prime is 9040491851. The next prime is 9040491913. The reversal of 9040491881 is 1881940409.

9040491881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4752861481 + 4287630400 = 68941^2 + 65480^2 .

It is a cyclic number.

It is not a de Polignac number, because 9040491881 - 2²² = 9036297577 is a prime.

It is a super-2 number, since 2×9040491881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9040491851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520245940 + 4520245941.

It is an arithmetic number, because the mean of its divisors is an integer number (4520245941).

Almost surely, 2^9040491881 is an apocalyptic number.

It is an amenable number.

9040491881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9040491881 is an equidigital number, since it uses as much as digits as its factorization.

9040491881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 9040491881 is about 95081.5012555019. The cubic root of 9040491881 is about 2083.1986566437.

The spelling of 9040491881 in words is "nine billion, forty million, four hundred ninety-one thousand, eight hundred eighty-one".