126563649 has 8 divisors (see below), whose sum is σ = 168893760. Its totient is φ = 84304656.

The previous prime is 126563599. The next prime is 126563651. The reversal of 126563649 is 946365621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126563649 - 2⁹ = 126563137 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126563649.

It is not an unprimeable number, because it can be changed into a prime (126563659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13477 + ... + 20850.

It is an arithmetic number, because the mean of its divisors is an integer number (21111720).

Almost surely, 2^126563649 is an apocalyptic number.

It is an amenable number.

126563649 is a deficient number, since it is larger than the sum of its proper divisors (42330111).

126563649 is a wasteful number, since it uses less digits than its factorization.

126563649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35559.

The product of its digits is 233280, while the sum is 42.

The square root of 126563649 is about 11250.0510665508. The cubic root of 126563649 is about 502.0762319219.

The spelling of 126563649 in words is "one hundred twenty-six million, five hundred sixty-three thousand, six hundred forty-nine".