40589897669 has 2 divisors, whose sum is σ = 40589897670. Its totient is φ = 40589897668.

The previous prime is 40589897591. The next prime is 40589897671. The reversal of 40589897669 is 96679898504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35245556644 + 5344341025 = 187738^2 + 73105^2 .

It is a cyclic number.

It is not a de Polignac number, because 40589897669 - 2¹² = 40589893573 is a prime.

It is a super-2 number, since 2×40589897669² (a number of 22 digits) contains 22 as substring.

Together with 40589897671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40589891669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20294948834 + 20294948835.

It is an arithmetic number, because the mean of its divisors is an integer number (20294948835).

Almost surely, 2^40589897669 is an apocalyptic number.

It is an amenable number.

40589897669 is a deficient number, since it is larger than the sum of its proper divisors (1).

40589897669 is an equidigital number, since it uses as much as digits as its factorization.

40589897669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235146240, while the sum is 71.

The spelling of 40589897669 in words is "forty billion, five hundred eighty-nine million, eight hundred ninety-seven thousand, six hundred sixty-nine".