10959147981 has 24 divisors (see below), whose sum is σ = 16143879960. Its totient is φ = 7161438336.

The previous prime is 10959147977. The next prime is 10959148009. The reversal of 10959147981 is 18974195901.

10959147981 is a `hidden beast` number, since 1 + 0 + 9 + 5 + 91 + 479 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 215825481 + 10743322500 = 14691^2 + 103650^2 .

It is not a de Polignac number, because 10959147981 - 2² = 10959147977 is a prime.

It is a super-2 number, since 2×10959147981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10959147961) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 518635 + ... + 539351.

It is an arithmetic number, because the mean of its divisors is an integer number (672661665).

Almost surely, 2^10959147981 is an apocalyptic number.

It is an amenable number.

10959147981 is a deficient number, since it is larger than the sum of its proper divisors (5184731979).

10959147981 is a wasteful number, since it uses less digits than its factorization.

10959147981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21885 (or 21882 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 54.

The spelling of 10959147981 in words is "ten billion, nine hundred fifty-nine million, one hundred forty-seven thousand, nine hundred eighty-one".