40689223537 has 2 divisors, whose sum is σ = 40689223538. Its totient is φ = 40689223536.

The previous prime is 40689223457. The next prime is 40689223609. The reversal of 40689223537 is 73532298604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28455978721 + 12233244816 = 168689^2 + 110604^2 .

It is a cyclic number.

It is not a de Polignac number, because 40689223537 - 2¹⁵ = 40689190769 is a prime.

It is a super-2 number, since 2×40689223537² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40689223637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344611768 + 20344611769.

It is an arithmetic number, because the mean of its divisors is an integer number (20344611769).

Almost surely, 2^40689223537 is an apocalyptic number.

It is an amenable number.

40689223537 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689223537 is an equidigital number, since it uses as much as digits as its factorization.

40689223537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 40689223537 in words is "forty billion, six hundred eighty-nine million, two hundred twenty-three thousand, five hundred thirty-seven".