10991545242 has 8 divisors (see below), whose sum is σ = 21983090496. Its totient is φ = 3663848412.

The previous prime is 10991545217. The next prime is 10991545261. The reversal of 10991545242 is 24254519901.

10991545242 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

10991545242 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 10991545194 and 10991545203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915962098 + ... + 915962109.

It is an arithmetic number, because the mean of its divisors is an integer number (2747886312).

Almost surely, 2^10991545242 is an apocalyptic number.

10991545242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10991545242 is a wasteful number, since it uses less digits than its factorization.

10991545242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831924212.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 10991545242 in words is "ten billion, nine hundred ninety-one million, five hundred forty-five thousand, two hundred forty-two".