40664782231 has 2 divisors, whose sum is σ = 40664782232. Its totient is φ = 40664782230.

The previous prime is 40664782211. The next prime is 40664782247. The reversal of 40664782231 is 13228746604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40664782231 - 2²¹ = 40662685079 is a prime.

It is a super-2 number, since 2×40664782231² (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 (40664782211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20332391115 + 20332391116.

It is an arithmetic number, because the mean of its divisors is an integer number (20332391116).

Almost surely, 2^40664782231 is an apocalyptic number.

40664782231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40664782231 is an equidigital number, since it uses as much as digits as its factorization.

40664782231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 40664782231 in words is "forty billion, six hundred sixty-four million, seven hundred eighty-two thousand, two hundred thirty-one".