40801349689 has 2 divisors, whose sum is σ = 40801349690. Its totient is φ = 40801349688.

The previous prime is 40801349663. The next prime is 40801349713. The reversal of 40801349689 is 98694310804.

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., 36940840000 + 3860509689 = 192200^2 + 62133^2 .

It is a cyclic number.

It is not a de Polignac number, because 40801349689 - 2⁵ = 40801349657 is a prime.

It is not a weakly prime, because it can be changed into another prime (40801349089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20400674844 + 20400674845.

It is an arithmetic number, because the mean of its divisors is an integer number (20400674845).

Almost surely, 2^40801349689 is an apocalyptic number.

It is an amenable number.

40801349689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40801349689 is an equidigital number, since it uses as much as digits as its factorization.

40801349689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 40801349689 in words is "forty billion, eight hundred one million, three hundred forty-nine thousand, six hundred eighty-nine".