40689223457 has 2 divisors, whose sum is σ = 40689223458. Its totient is φ = 40689223456.

The previous prime is 40689223423. The next prime is 40689223537. The reversal of 40689223457 is 75432298604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34753907776 + 5935315681 = 186424^2 + 77041^2 .

It is a cyclic number.

It is not a de Polignac number, because 40689223457 - 2³² = 36394256161 is a prime.

It is a super-2 number, since 2×40689223457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40689213457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344611728 + 20344611729.

It is an arithmetic number, because the mean of its divisors is an integer number (20344611729).

Almost surely, 2^40689223457 is an apocalyptic number.

It is an amenable number.

40689223457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689223457 is an equidigital number, since it uses as much as digits as its factorization.

40689223457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 40689223457 in words is "forty billion, six hundred eighty-nine million, two hundred twenty-three thousand, four hundred fifty-seven".