10978722081 has 12 divisors (see below), whose sum is σ = 15871462308. Its totient is φ = 7313005824.

The previous prime is 10978722071. The next prime is 10978722113. The reversal of 10978722081 is 18022787901.

It can be written as a sum of positive squares in 2 ways, for example, as 8664631056 + 2314091025 = 93084^2 + 48105^2 .

It is not a de Polignac number, because 10978722081 - 2⁷ = 10978721953 is a prime.

It is a super-2 number, since 2×10978722081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10978722071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500520 + ... + 521993.

It is an arithmetic number, because the mean of its divisors is an integer number (1322621859).

Almost surely, 2^10978722081 is an apocalyptic number.

It is an amenable number.

10978722081 is a deficient number, since it is larger than the sum of its proper divisors (4892740227).

10978722081 is a wasteful number, since it uses less digits than its factorization.

10978722081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023712 (or 1023709 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 10978722081 in words is "ten billion, nine hundred seventy-eight million, seven hundred twenty-two thousand, eighty-one".