40623523189 has 2 divisors, whose sum is σ = 40623523190. Its totient is φ = 40623523188.

The previous prime is 40623523163. The next prime is 40623523231. The reversal of 40623523189 is 98132532604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22909244164 + 17714279025 = 151358^2 + 133095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40623523189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40623523159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20311761594 + 20311761595.

It is an arithmetic number, because the mean of its divisors is an integer number (20311761595).

Almost surely, 2^40623523189 is an apocalyptic number.

It is an amenable number.

40623523189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40623523189 is an equidigital number, since it uses as much as digits as its factorization.

40623523189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 40623523189 in words is "forty billion, six hundred twenty-three million, five hundred twenty-three thousand, one hundred eighty-nine".