1161421004560 has 160 divisors (see below), whose sum is σ = 2799660810240. Its totient is φ = 447725408256.

The previous prime is 1161421004521. The next prime is 1161421004641. The reversal of 1161421004560 is 654001241611.

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 31 ways as a sum of consecutive naturals, for example, 270284332 + ... + 270288628.

It is an arithmetic number, because the mean of its divisors is an integer number (17497880064).

Almost surely, 2^{1161421004560} is an apocalyptic number.

1161421004560 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 1161421004560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399830405120).

1161421004560 is an abundant number, since it is smaller than the sum of its proper divisors (1638239805680).

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

1161421004560 is a wasteful number, since it uses less digits than its factorization.

1161421004560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193 (or 5187 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 1161421004560 in words is "one trillion, one hundred sixty-one billion, four hundred twenty-one million, four thousand, five hundred sixty".