40681308161633 has 4 divisors (see below), whose sum is σ = 40689283330068. Its totient is φ = 40673332993200.

The previous prime is 40681308161569. The next prime is 40681308161701. The reversal of 40681308161633 is 33616180318604.

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 15376303515169 + 25305004646464 = 3921263^2 + 5030408^2 .

It is a cyclic number.

It is not a de Polignac number, because 40681308161633 - 2⁶ = 40681308161569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40681308961633) 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, 3987576566 + ... + 3987586767.

It is an arithmetic number, because the mean of its divisors is an integer number (10172320832517).

Almost surely, 2^{40681308161633} is an apocalyptic number.

It is an amenable number.

40681308161633 is a deficient number, since it is larger than the sum of its proper divisors (7975168435).

40681308161633 is an equidigital number, since it uses as much as digits as its factorization.

40681308161633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7975168434.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 40681308161633 in words is "forty trillion, six hundred eighty-one billion, three hundred eight million, one hundred sixty-one thousand, six hundred thirty-three".