40436389069 has 8 divisors (see below), whose sum is σ = 40740711480. Its totient is φ = 40132878336.

The previous prime is 40436389067. The next prime is 40436389099. The reversal of 40436389069 is 96098363404.

It can be written as a sum of positive squares in 4 ways, for example, as 19269048969 + 21167340100 = 138813^2 + 145490^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40436389069 - 2¹ = 40436389067 is a prime.

It is a super-2 number, since 2×40436389069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40436389067) 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 in 7 ways as a sum of consecutive naturals, for example, 102724 + ... + 302365.

It is an arithmetic number, because the mean of its divisors is an integer number (5092588935).

Almost surely, 2^40436389069 is an apocalyptic number.

It is an amenable number.

40436389069 is a deficient number, since it is larger than the sum of its proper divisors (304322411).

40436389069 is a wasteful number, since it uses less digits than its factorization.

40436389069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405839.

The product of its (nonzero) digits is 3359232, while the sum is 52.

The spelling of 40436389069 in words is "forty billion, four hundred thirty-six million, three hundred eighty-nine thousand, sixty-nine".