40840488791 has 2 divisors, whose sum is σ = 40840488792. Its totient is φ = 40840488790.

The previous prime is 40840488761. The next prime is 40840488839. The reversal of 40840488791 is 19788404804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40840488791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40840488761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20420244395 + 20420244396.

It is an arithmetic number, because the mean of its divisors is an integer number (20420244396).

Almost surely, 2^40840488791 is an apocalyptic number.

40840488791 is a deficient number, since it is larger than the sum of its proper divisors (1).

40840488791 is an equidigital number, since it uses as much as digits as its factorization.

40840488791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 40840488791 in words is "forty billion, eight hundred forty million, four hundred eighty-eight thousand, seven hundred ninety-one".