40575359785021 has 2 divisors, whose sum is σ = 40575359785022. Its totient is φ = 40575359785020.

The previous prime is 40575359784929. The next prime is 40575359785031. The reversal of 40575359785021 is 12058795357504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23662251156996 + 16913108628025 = 4864386^2 + 4112555^2 .

It is a cyclic number.

It is not a de Polignac number, because 40575359785021 - 2⁷ = 40575359784893 is a prime.

It is a super-2 number, since 2×40575359785021² (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 (40575359785031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20287679892510 + 20287679892511.

It is an arithmetic number, because the mean of its divisors is an integer number (20287679892511).

Almost surely, 2^{40575359785021} is an apocalyptic number.

It is an amenable number.

40575359785021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40575359785021 is an equidigital number, since it uses as much as digits as its factorization.

40575359785021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920000, while the sum is 61.

The spelling of 40575359785021 in words is "forty trillion, five hundred seventy-five billion, three hundred fifty-nine million, seven hundred eighty-five thousand, twenty-one".