2606424599981 has 2 divisors, whose sum is σ = 2606424599982. Its totient is φ = 2606424599980.

The previous prime is 2606424599963. The next prime is 2606424600001. The reversal of 2606424599981 is 1899954246062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1706592125956 + 899832474025 = 1306366^2 + 948595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606424599981 - 2³⁰ = 2605350858157 is a prime.

It is a super-2 number, since 2×2606424599981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2606424599081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303212299990 + 1303212299991.

It is an arithmetic number, because the mean of its divisors is an integer number (1303212299991).

Almost surely, 2^{2606424599981} is an apocalyptic number.

It is an amenable number.

2606424599981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606424599981 is an equidigital number, since it uses as much as digits as its factorization.

2606424599981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67184640, while the sum is 65.

The spelling of 2606424599981 in words is "two trillion, six hundred six billion, four hundred twenty-four million, five hundred ninety-nine thousand, nine hundred eighty-one".