40838813665 has 16 divisors (see below), whose sum is σ = 53088613200. Its totient is φ = 30157885056.

The previous prime is 40838813657. The next prime is 40838813683. The reversal of 40838813665 is 56631883804.

40838813665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 27747563776 + 13091249889 = 166576^2 + 114417^2 .

It is not a de Polignac number, because 40838813665 - 2³ = 40838813657 is a prime.

It is a super-3 number, since 3×40838813665³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847860 + ... + 1869829.

It is an arithmetic number, because the mean of its divisors is an integer number (3318038325).

Almost surely, 2^40838813665 is an apocalyptic number.

It is an amenable number.

40838813665 is a deficient number, since it is larger than the sum of its proper divisors (12249799535).

40838813665 is an equidigital number, since it uses as much as digits as its factorization.

40838813665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3717733 (or 3717707 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 40838813665 in words is "forty billion, eight hundred thirty-eight million, eight hundred thirteen thousand, six hundred sixty-five".