40611838081 has 4 divisors (see below), whose sum is σ = 40627011412. Its totient is φ = 40596664752.

The previous prime is 40611838073. The next prime is 40611838109. The reversal of 40611838081 is 18083811604.

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 19293210000 + 21318628081 = 138900^2 + 146009^2 .

It is a cyclic number.

It is not a de Polignac number, because 40611838081 - 2³ = 40611838073 is a prime.

It is a super-2 number, since 2×40611838081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40611838181) 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, 7582650 + ... + 7588003.

It is an arithmetic number, because the mean of its divisors is an integer number (10156752853).

Almost surely, 2^40611838081 is an apocalyptic number.

It is an amenable number.

40611838081 is a deficient number, since it is larger than the sum of its proper divisors (15173331).

40611838081 is a wasteful number, since it uses less digits than its factorization.

40611838081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15173330.

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 40611838081 in words is "forty billion, six hundred eleven million, eight hundred thirty-eight thousand, eighty-one".