40656660455413 has 2 divisors, whose sum is σ = 40656660455414. Its totient is φ = 40656660455412.

The previous prime is 40656660455407. The next prime is 40656660455459. The reversal of 40656660455413 is 31455406665604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35925134962564 + 4731525492849 = 5993758^2 + 2175207^2 .

It is a cyclic number.

It is not a de Polignac number, because 40656660455413 - 2²⁹ = 40656123584501 is a prime.

It is a super-2 number, since 2×40656660455413² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40656660255413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20328330227706 + 20328330227707.

It is an arithmetic number, because the mean of its divisors is an integer number (20328330227707).

Almost surely, 2^{40656660455413} is an apocalyptic number.

It is an amenable number.

40656660455413 is a deficient number, since it is larger than the sum of its proper divisors (1).

40656660455413 is an equidigital number, since it uses as much as digits as its factorization.

40656660455413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 40656660455413 in words is "forty trillion, six hundred fifty-six billion, six hundred sixty million, four hundred fifty-five thousand, four hundred thirteen".