40838538809 has 4 divisors (see below), whose sum is σ = 41220207504. Its totient is φ = 40456870116.

The previous prime is 40838538773. The next prime is 40838538827. The reversal of 40838538809 is 90883583804.

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 40838538809 - 2¹² = 40838534713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40838538709) 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, 190834187 + ... + 190834400.

It is an arithmetic number, because the mean of its divisors is an integer number (10305051876).

Almost surely, 2^40838538809 is an apocalyptic number.

It is an amenable number.

40838538809 is a deficient number, since it is larger than the sum of its proper divisors (381668695).

40838538809 is a wasteful number, since it uses less digits than its factorization.

40838538809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381668694.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 40838538809 in words is "forty billion, eight hundred thirty-eight million, five hundred thirty-eight thousand, eight hundred nine".