326440136461 has 2 divisors, whose sum is σ = 326440136462. Its totient is φ = 326440136460.

The previous prime is 326440136437. The next prime is 326440136513. The reversal of 326440136461 is 164631044623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182196654025 + 144243482436 = 426845^2 + 379794^2 .

It is a cyclic number.

It is not a de Polignac number, because 326440136461 - 2¹⁷ = 326440005389 is a prime.

It is a super-3 number, since 3×326440136461³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326440136401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163220068230 + 163220068231.

It is an arithmetic number, because the mean of its divisors is an integer number (163220068231).

Almost surely, 2^326440136461 is an apocalyptic number.

It is an amenable number.

326440136461 is a deficient number, since it is larger than the sum of its proper divisors (1).

326440136461 is an equidigital number, since it uses as much as digits as its factorization.

326440136461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 326440136461 in words is "three hundred twenty-six billion, four hundred forty million, one hundred thirty-six thousand, four hundred sixty-one".