40136066281 has 4 divisors (see below), whose sum is σ = 40203072000. Its totient is φ = 40069060564.

The previous prime is 40136066273. The next prime is 40136066291. The reversal of 40136066281 is 18266063104.

It is a happy number.

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 40136066281 - 2³ = 40136066273 is a prime.

It is a super-2 number, since 2×40136066281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40136066281.

It is not an unprimeable number, because it can be changed into a prime (40136066291) 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, 33501961 + ... + 33503158.

It is an arithmetic number, because the mean of its divisors is an integer number (10050768000).

Almost surely, 2^40136066281 is an apocalyptic number.

It is an amenable number.

40136066281 is a deficient number, since it is larger than the sum of its proper divisors (67005719).

40136066281 is an equidigital number, since it uses as much as digits as its factorization.

40136066281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67005718.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 40136066281 in words is "forty billion, one hundred thirty-six million, sixty-six thousand, two hundred eighty-one".