1115857385280 has 336 divisors, whose sum is σ = 4249501873344. Its totient is φ = 266472898560.

The previous prime is 1115857385243. The next prime is 1115857385299. The reversal of 1115857385280 is 825837585111.

1115857385280 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 85 + 7 + 38 + 528 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1859704 + ... + 2385416.

It is an arithmetic number, because the mean of its divisors is an integer number (12647327004).

Almost surely, 2^{1115857385280} is an apocalyptic number.

1115857385280 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 1115857385280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124750936672).

1115857385280 is an abundant number, since it is smaller than the sum of its proper divisors (3133644488064).

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

1115857385280 is a wasteful number, since it uses less digits than its factorization.

1115857385280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525814 (or 525801 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 54.

The spelling of 1115857385280 in words is "one trillion, one hundred fifteen billion, eight hundred fifty-seven million, three hundred eighty-five thousand, two hundred eighty".