40351206602549 has 2 divisors, whose sum is σ = 40351206602550. Its totient is φ = 40351206602548.

The previous prime is 40351206602417. The next prime is 40351206602563. The reversal of 40351206602549 is 94520660215304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39647045628100 + 704160974449 = 6296590^2 + 839143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40351206602549 is a prime.

It is a super-2 number, since 2×40351206602549² (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 (40351206602849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20175603301274 + 20175603301275.

It is an arithmetic number, because the mean of its divisors is an integer number (20175603301275).

Almost surely, 2^{40351206602549} is an apocalyptic number.

It is an amenable number.

40351206602549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40351206602549 is an equidigital number, since it uses as much as digits as its factorization.

40351206602549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 40351206602549 in words is "forty trillion, three hundred fifty-one billion, two hundred six million, six hundred two thousand, five hundred forty-nine".