10991580503080 has 128 divisors (see below), whose sum is σ = 25311406538880. Its totient is φ = 4294894556160.

The previous prime is 10991580503041. The next prime is 10991580503083. The reversal of 10991580503080 is 8030508519901.

It is not an unprimeable number, because it can be changed into a prime (10991580503083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120427222 + ... + 120518458.

It is an arithmetic number, because the mean of its divisors is an integer number (197745363585).

Almost surely, 2^{10991580503080} is an apocalyptic number.

10991580503080 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 10991580503080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12655703269440).

10991580503080 is an abundant number, since it is smaller than the sum of its proper divisors (14319826035800).

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

10991580503080 is a wasteful number, since it uses less digits than its factorization.

10991580503080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91739 (or 91735 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 10991580503080 in words is "ten trillion, nine hundred ninety-one billion, five hundred eighty million, five hundred three thousand, eighty".