42026646546649 has 2 divisors, whose sum is σ = 42026646546650. Its totient is φ = 42026646546648.

The previous prime is 42026646546629. The next prime is 42026646546671. The reversal of 42026646546649 is 94664564662024.

42026646546649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27484382928025 + 14542263618624 = 5242555^2 + 3813432^2 .

It is a cyclic number.

It is not a de Polignac number, because 42026646546649 - 2²¹ = 42026644449497 is a prime.

It is not a weakly prime, because it can be changed into another prime (42026646546629) 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, 21013323273324 + 21013323273325.

It is an arithmetic number, because the mean of its divisors is an integer number (21013323273325).

Almost surely, 2^{42026646546649} is an apocalyptic number.

It is an amenable number.

42026646546649 is a deficient number, since it is larger than the sum of its proper divisors (1).

42026646546649 is an equidigital number, since it uses as much as digits as its factorization.

42026646546649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358318080, while the sum is 64.

The spelling of 42026646546649 in words is "forty-two trillion, twenty-six billion, six hundred forty-six million, five hundred forty-six thousand, six hundred forty-nine".