40826798569 has 2 divisors, whose sum is σ = 40826798570. Its totient is φ = 40826798568.

The previous prime is 40826798561. The next prime is 40826798599. The reversal of 40826798569 is 96589762804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40618371600 + 208426969 = 201540^2 + 14437^2 .

It is a cyclic number.

It is not a de Polignac number, because 40826798569 - 2³ = 40826798561 is a prime.

It is a super-2 number, since 2×40826798569² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40826798569.

It is not a weakly prime, because it can be changed into another prime (40826798561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20413399284 + 20413399285.

It is an arithmetic number, because the mean of its divisors is an integer number (20413399285).

Almost surely, 2^40826798569 is an apocalyptic number.

It is an amenable number.

40826798569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40826798569 is an equidigital number, since it uses as much as digits as its factorization.

40826798569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 40826798569 in words is "forty billion, eight hundred twenty-six million, seven hundred ninety-eight thousand, five hundred sixty-nine".