4026640246649 has 2 divisors, whose sum is σ = 4026640246650. Its totient is φ = 4026640246648.

The previous prime is 4026640246571. The next prime is 4026640246663. The reversal of 4026640246649 is 9466420466204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3208999311424 + 817640935225 = 1791368^2 + 904235^2 .

It is a cyclic number.

It is not a de Polignac number, because 4026640246649 - 2¹² = 4026640242553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4026640246649.

It is not a weakly prime, because it can be changed into another prime (4026640216649) 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, 2013320123324 + 2013320123325.

It is an arithmetic number, because the mean of its divisors is an integer number (2013320123325).

Almost surely, 2^{4026640246649} is an apocalyptic number.

It is an amenable number.

4026640246649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4026640246649 is an equidigital number, since it uses as much as digits as its factorization.

4026640246649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 53.

The spelling of 4026640246649 in words is "four trillion, twenty-six billion, six hundred forty million, two hundred forty-six thousand, six hundred forty-nine".