40585201669 has 2 divisors, whose sum is σ = 40585201670. Its totient is φ = 40585201668.

The previous prime is 40585201567. The next prime is 40585201673. The reversal of 40585201669 is 96610258504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20410408225 + 20174793444 = 142865^2 + 142038^2 .

It is a cyclic number.

It is not a de Polignac number, because 40585201669 - 2³¹ = 38437718021 is a prime.

It is a super-2 number, since 2×40585201669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40585271669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20292600834 + 20292600835.

It is an arithmetic number, because the mean of its divisors is an integer number (20292600835).

Almost surely, 2^40585201669 is an apocalyptic number.

It is an amenable number.

40585201669 is a deficient number, since it is larger than the sum of its proper divisors (1).

40585201669 is an equidigital number, since it uses as much as digits as its factorization.

40585201669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 40585201669 in words is "forty billion, five hundred eighty-five million, two hundred one thousand, six hundred sixty-nine".