40686686353 has 2 divisors, whose sum is σ = 40686686354. Its totient is φ = 40686686352.

The previous prime is 40686686351. The next prime is 40686686363. The reversal of 40686686353 is 35368668604.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22210537024 + 18476149329 = 149032^2 + 135927^2 .

It is a cyclic number.

It is not a de Polignac number, because 40686686353 - 2¹ = 40686686351 is a prime.

Together with 40686686351, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40686686294 and 40686686303.

It is not a weakly prime, because it can be changed into another prime (40686686351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343343176 + 20343343177.

It is an arithmetic number, because the mean of its divisors is an integer number (20343343177).

Almost surely, 2^40686686353 is an apocalyptic number.

It is an amenable number.

40686686353 is a deficient number, since it is larger than the sum of its proper divisors (1).

40686686353 is an equidigital number, since it uses as much as digits as its factorization.

40686686353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 40686686353 in words is "forty billion, six hundred eighty-six million, six hundred eighty-six thousand, three hundred fifty-three".