1217532648 has 16 divisors (see below), whose sum is σ = 3043831680. Its totient is φ = 405844208.

The previous prime is 1217532647. The next prime is 1217532671. The reversal of 1217532648 is 8462357121.

It is not an unprimeable number, because it can be changed into a prime (1217532647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25365240 + ... + 25365287.

It is an arithmetic number, because the mean of its divisors is an integer number (190239480).

Almost surely, 2^1217532648 is an apocalyptic number.

It is an amenable number.

1217532648 is an abundant number, since it is smaller than the sum of its proper divisors (1826299032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217532648 is a wasteful number, since it uses less digits than its factorization.

1217532648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50730536 (or 50730532 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 1217532648 is about 34893.1604759443. The cubic root of 1217532648 is about 1067.8089054781.

Adding to 1217532648 its reverse (8462357121), we get a palindrome (9679889769).

The spelling of 1217532648 in words is "one billion, two hundred seventeen million, five hundred thirty-two thousand, six hundred forty-eight".