40508535509 has 8 divisors (see below), whose sum is σ = 44056504632. Its totient is φ = 37022270400.

The previous prime is 40508535491. The next prime is 40508535539. The reversal of 40508535509 is 90553580504.

It can be written as a sum of positive squares in 4 ways, for example, as 3739322500 + 36769213009 = 61150^2 + 191753^2 .

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 40508535509 - 2¹⁶ = 40508469973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40508535509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40508535539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15424634 + ... + 15427259.

It is an arithmetic number, because the mean of its divisors is an integer number (5507063079).

Almost surely, 2^40508535509 is an apocalyptic number.

It is an amenable number.

40508535509 is a deficient number, since it is larger than the sum of its proper divisors (3547969123).

40508535509 is a wasteful number, since it uses less digits than its factorization.

40508535509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30852007.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 40508535509 in words is "forty billion, five hundred eight million, five hundred thirty-five thousand, five hundred nine".