40166872589 has 2 divisors, whose sum is σ = 40166872590. Its totient is φ = 40166872588.

The previous prime is 40166872573. The next prime is 40166872597. The reversal of 40166872589 is 98527866104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33212146564 + 6954726025 = 182242^2 + 83395^2 .

It is a cyclic number.

It is not a de Polignac number, because 40166872589 - 2⁴ = 40166872573 is a prime.

It is a super-2 number, since 2×40166872589² (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 (40166872289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20083436294 + 20083436295.

It is an arithmetic number, because the mean of its divisors is an integer number (20083436295).

Almost surely, 2^40166872589 is an apocalyptic number.

It is an amenable number.

40166872589 is a deficient number, since it is larger than the sum of its proper divisors (1).

40166872589 is an equidigital number, since it uses as much as digits as its factorization.

40166872589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 40166872589 in words is "forty billion, one hundred sixty-six million, eight hundred seventy-two thousand, five hundred eighty-nine".