40217638541 has 4 divisors (see below), whose sum is σ = 40615833084. Its totient is φ = 39819444000.

The previous prime is 40217638529. The next prime is 40217638543. The reversal of 40217638541 is 14583671204.

40217638541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19952692516 + 20264946025 = 141254^2 + 142355^2 .

It is a cyclic number.

It is not a de Polignac number, because 40217638541 - 2⁶ = 40217638477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40217638543) 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, 199097120 + ... + 199097321.

It is an arithmetic number, because the mean of its divisors is an integer number (10153958271).

Almost surely, 2^40217638541 is an apocalyptic number.

It is an amenable number.

40217638541 is a deficient number, since it is larger than the sum of its proper divisors (398194543).

40217638541 is a wasteful number, since it uses less digits than its factorization.

40217638541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398194542.

The product of its (nonzero) digits is 161280, while the sum is 41.

It can be divided in two parts, 4021763 and 8541, that added together give a palindrome (4030304).

The spelling of 40217638541 in words is "forty billion, two hundred seventeen million, six hundred thirty-eight thousand, five hundred forty-one".