40326866689 has 4 divisors (see below), whose sum is σ = 40372641540. Its totient is φ = 40281091840.

The previous prime is 40326866683. The next prime is 40326866707. The reversal of 40326866689 is 98666862304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2114436289 + 38212430400 = 45983^2 + 195480^2 .

It is a cyclic number.

It is not a de Polignac number, because 40326866689 - 2³¹ = 38179383041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40326866683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22886104 + ... + 22887865.

It is an arithmetic number, because the mean of its divisors is an integer number (10093160385).

Almost surely, 2^40326866689 is an apocalyptic number.

It is an amenable number.

40326866689 is a deficient number, since it is larger than the sum of its proper divisors (45774851).

40326866689 is an equidigital number, since it uses as much as digits as its factorization.

40326866689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45774850.

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 40326866689 in words is "forty billion, three hundred twenty-six million, eight hundred sixty-six thousand, six hundred eighty-nine".