40689664583 has 2 divisors, whose sum is σ = 40689664584. Its totient is φ = 40689664582.

The previous prime is 40689664571. The next prime is 40689664597. The reversal of 40689664583 is 38546698604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40689664583 - 2¹⁴ = 40689648199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40689664783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344832291 + 20344832292.

It is an arithmetic number, because the mean of its divisors is an integer number (20344832292).

Almost surely, 2^40689664583 is an apocalyptic number.

40689664583 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689664583 is an equidigital number, since it uses as much as digits as its factorization.

40689664583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 40689664583 in words is "forty billion, six hundred eighty-nine million, six hundred sixty-four thousand, five hundred eighty-three".