40020356261297 has 2 divisors, whose sum is σ = 40020356261298. Its totient is φ = 40020356261296.

The previous prime is 40020356261267. The next prime is 40020356261341. The reversal of 40020356261297 is 79216265302004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25330927944256 + 14689428317041 = 5032984^2 + 3832679^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020356261297 - 2¹⁸ = 40020355999153 is a prime.

It is a super-2 number, since 2×40020356261297² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40020356261267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010178130648 + 20010178130649.

It is an arithmetic number, because the mean of its divisors is an integer number (20010178130649).

Almost surely, 2^{40020356261297} is an apocalyptic number.

It is an amenable number.

40020356261297 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020356261297 is an equidigital number, since it uses as much as digits as its factorization.

40020356261297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 40020356261297 in words is "forty trillion, twenty billion, three hundred fifty-six million, two hundred sixty-one thousand, two hundred ninety-seven".