40868532509 has 4 divisors (see below), whose sum is σ = 46706894304. Its totient is φ = 35030170716.

The previous prime is 40868532461. The next prime is 40868532553. The reversal of 40868532509 is 90523586804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40868532509 - 2¹² = 40868528413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40868532709) 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 3 ways as a sum of consecutive naturals, for example, 2919180887 + ... + 2919180900.

It is an arithmetic number, because the mean of its divisors is an integer number (11676723576).

Almost surely, 2^40868532509 is an apocalyptic number.

It is an amenable number.

40868532509 is a deficient number, since it is larger than the sum of its proper divisors (5838361795).

40868532509 is an equidigital number, since it uses as much as digits as its factorization.

40868532509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838361794.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 40868532509 in words is "forty billion, eight hundred sixty-eight million, five hundred thirty-two thousand, five hundred nine".