40850404657 has 2 divisors, whose sum is σ = 40850404658. Its totient is φ = 40850404656.

The previous prime is 40850404649. The next prime is 40850404663. The reversal of 40850404657 is 75640405804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38309841441 + 2540563216 = 195729^2 + 50404^2 .

It is a cyclic number.

It is not a de Polignac number, because 40850404657 - 2³ = 40850404649 is a prime.

It is not a weakly prime, because it can be changed into another prime (40850404607) 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, 20425202328 + 20425202329.

It is an arithmetic number, because the mean of its divisors is an integer number (20425202329).

Almost surely, 2^40850404657 is an apocalyptic number.

It is an amenable number.

40850404657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40850404657 is an equidigital number, since it uses as much as digits as its factorization.

40850404657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 40850404657 in words is "forty billion, eight hundred fifty million, four hundred four thousand, six hundred fifty-seven".