10991881962 has 24 divisors (see below), whose sum is σ = 24396617700. Its totient is φ = 3574595520.

The previous prime is 10991881951. The next prime is 10991881973. The reversal of 10991881962 is 26918819901.

It is an interprime number because it is at equal distance from previous prime (10991881951) and next prime (10991881973).

It can be written as a sum of positive squares in 2 ways, for example, as 10947646161 + 44235801 = 104631^2 + 6651^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10991881899 and 10991881908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7446337 + ... + 7447812.

Almost surely, 2^10991881962 is an apocalyptic number.

10991881962 is an abundant number, since it is smaller than the sum of its proper divisors (13404735738).

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

10991881962 is a wasteful number, since it uses less digits than its factorization.

10991881962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14894198 (or 14894195 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 10991881962 in words is "ten billion, nine hundred ninety-one million, eight hundred eighty-one thousand, nine hundred sixty-two".