42229756986449 has 2 divisors, whose sum is σ = 42229756986450. Its totient is φ = 42229756986448.

The previous prime is 42229756986427. The next prime is 42229756986539. The reversal of 42229756986449 is 94468965792224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38152055260225 + 4077701726224 = 6176735^2 + 2019332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42229756986449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42229756986449.

It is not a weakly prime, because it can be changed into another prime (42229756986419) 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, 21114878493224 + 21114878493225.

It is an arithmetic number, because the mean of its divisors is an integer number (21114878493225).

Almost surely, 2^{42229756986449} is an apocalyptic number.

It is an amenable number.

42229756986449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42229756986449 is an equidigital number, since it uses as much as digits as its factorization.

42229756986449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3762339840, while the sum is 77.

The spelling of 42229756986449 in words is "forty-two trillion, two hundred twenty-nine billion, seven hundred fifty-six million, nine hundred eighty-six thousand, four hundred forty-nine".