1117213722648 has 112 divisors (see below), whose sum is σ = 3148021000800. Its totient is φ = 371539690560.

The previous prime is 1117213722637. The next prime is 1117213722661. The reversal of 1117213722648 is 8462273127111.

It is a happy number.

1117213722648 is a `hidden beast` number, since 1 + 1 + 17 + 2 + 1 + 372 + 264 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2291358 + ... + 2735826.

Almost surely, 2^{1117213722648} is an apocalyptic number.

1117213722648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1117213722648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574010500400).

1117213722648 is an abundant number, since it is smaller than the sum of its proper divisors (2030807278152).

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

1117213722648 is an equidigital number, since it uses as much as digits as its factorization.

1117213722648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444924 (or 444905 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

Adding to 1117213722648 its reverse (8462273127111), we get a palindrome (9579486849759).

The spelling of 1117213722648 in words is "one trillion, one hundred seventeen billion, two hundred thirteen million, seven hundred twenty-two thousand, six hundred forty-eight".