40268644686205 has 8 divisors (see below), whose sum is σ = 52039479286872. Its totient is φ = 29736845306688.

The previous prime is 40268644686181. The next prime is 40268644686209. The reversal of 40268644686205 is 50268644686204.

It can be written as a sum of positive squares in 4 ways, for example, as 1151788289796 + 39116856396409 = 1073214^2 + 6254347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40268644686205 - 2³⁹ = 39718888872317 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 (40268644686209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309758805214 + ... + 309758805343.

It is an arithmetic number, because the mean of its divisors is an integer number (6504934910859).

Almost surely, 2^{40268644686205} is an apocalyptic number.

It is an amenable number.

40268644686205 is a deficient number, since it is larger than the sum of its proper divisors (11770834600667).

40268644686205 is a wasteful number, since it uses less digits than its factorization.

40268644686205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619517610575.

The product of its (nonzero) digits is 106168320, while the sum is 61.

Subtracting 40268644686205 from its reverse (50268644686204), we obtain a palindrome (9999999999999).

The spelling of 40268644686205 in words is "forty trillion, two hundred sixty-eight billion, six hundred forty-four million, six hundred eighty-six thousand, two hundred five".