40685783597 has 2 divisors, whose sum is σ = 40685783598. Its totient is φ = 40685783596.

The previous prime is 40685783591. The next prime is 40685783657. The reversal of 40685783597 is 79538758604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38722761961 + 1963021636 = 196781^2 + 44306^2 .

It is a cyclic number.

It is not a de Polignac number, because 40685783597 - 2¹⁸ = 40685521453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40685783591) 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, 20342891798 + 20342891799.

It is an arithmetic number, because the mean of its divisors is an integer number (20342891799).

Almost surely, 2^40685783597 is an apocalyptic number.

It is an amenable number.

40685783597 is a deficient number, since it is larger than the sum of its proper divisors (1).

40685783597 is an equidigital number, since it uses as much as digits as its factorization.

40685783597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 40685783597 in words is "forty billion, six hundred eighty-five million, seven hundred eighty-three thousand, five hundred ninety-seven".