1217623400448 has 1008 divisors, whose sum is σ = 4243567124736. Its totient is φ = 309162147840.

The previous prime is 1217623400447. The next prime is 1217623400459. The reversal of 1217623400448 is 8440043267121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1217623400447) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6308929440 + ... + 6308929632.

Almost surely, 2^{1217623400448} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217623400448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121783562368).

1217623400448 is an abundant number, since it is smaller than the sum of its proper divisors (3025943724288).

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

1217623400448 is a wasteful number, since it uses less digits than its factorization.

1217623400448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

Adding to 1217623400448 its reverse (8440043267121), we get a palindrome (9657666667569).

The spelling of 1217623400448 in words is "one trillion, two hundred seventeen billion, six hundred twenty-three million, four hundred thousand, four hundred forty-eight".