10991616140 has 24 divisors (see below), whose sum is σ = 23619195600. Its totient is φ = 4294398528.

The previous prime is 10991616127. The next prime is 10991616149. The reversal of 10991616140 is 4161619901.

It is a super-3 number, since 3×10991616140³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10991616094 and 10991616103.

It is not an unprimeable number, because it can be changed into a prime (10991616149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6389615 + ... + 6391334.

It is an arithmetic number, because the mean of its divisors is an integer number (984133150).

Almost surely, 2^10991616140 is an apocalyptic number.

10991616140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10991616140 is an abundant number, since it is smaller than the sum of its proper divisors (12627579460).

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

10991616140 is a wasteful number, since it uses less digits than its factorization.

10991616140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781001 (or 12780999 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 10991616140 in words is "ten billion, nine hundred ninety-one million, six hundred sixteen thousand, one hundred forty".