1001111505560 has 128 divisors (see below), whose sum is σ = 2429536032000. Its totient is φ = 370035703296.

The previous prime is 1001111505551. The next prime is 1001111505601. The reversal of 1001111505560 is 655051111001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24129794 + ... + 24171246.

It is an arithmetic number, because the mean of its divisors is an integer number (18980750250).

Almost surely, 2^{1001111505560} is an apocalyptic number.

1001111505560 is a gapful number since it is divisible by the number (10) 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 1001111505560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214768016000).

1001111505560 is an abundant number, since it is smaller than the sum of its proper divisors (1428424526440).

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

1001111505560 is a wasteful number, since it uses less digits than its factorization.

1001111505560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42265 (or 42261 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 26.

Adding to 1001111505560 its reverse (655051111001), we get a palindrome (1656162616561).

The spelling of 1001111505560 in words is "one trillion, one billion, one hundred eleven million, five hundred five thousand, five hundred sixty".