1111191361280 has 864 divisors, whose sum is σ = 3676526448000. Its totient is φ = 319504711680.

The previous prime is 1111191361157. The next prime is 1111191361289. The reversal of 1111191361280 is 821631911111.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1111191361280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111191361289) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 690609116 + ... + 690610724.

Almost surely, 2^{1111191361280} is an apocalyptic number.

1111191361280 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 1111191361280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838263224000).

1111191361280 is an abundant number, since it is smaller than the sum of its proper divisors (2565335086720).

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

1111191361280 is a wasteful number, since it uses less digits than its factorization.

1111191361280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 1111191361280 in words is "one trillion, one hundred eleven billion, one hundred ninety-one million, three hundred sixty-one thousand, two hundred eighty".