1101559980 has 48 divisors (see below), whose sum is σ = 3105093600. Its totient is φ = 291775488.

The previous prime is 1101559969. The next prime is 1101560011. The reversal of 1101559980 is 899551011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52669 + ... + 70548.

It is an arithmetic number, because the mean of its divisors is an integer number (64689450).

Almost surely, 2^1101559980 is an apocalyptic number.

1101559980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101559980 is an abundant number, since it is smaller than the sum of its proper divisors (2003533620).

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

1101559980 is a wasteful number, since it uses less digits than its factorization.

1101559980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123378 (or 123376 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 39.

The square root of 1101559980 is about 33189.7571548814. The cubic root of 1101559980 is about 1032.7678656665.

The spelling of 1101559980 in words is "one billion, one hundred one million, five hundred fifty-nine thousand, nine hundred eighty".