10931861780 has 36 divisors (see below), whose sum is σ = 26704979028. Its totient is φ = 3748066560.

The previous prime is 10931861771. The next prime is 10931861813. The reversal of 10931861780 is 8716813901.

10931861780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2117656324 + 8814205456 = 46018^2 + 93884^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5576501 + ... + 5578460.

It is an arithmetic number, because the mean of its divisors is an integer number (741804973).

Almost surely, 2^10931861780 is an apocalyptic number.

10931861780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10931861780 is an abundant number, since it is smaller than the sum of its proper divisors (15773117248).

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

10931861780 is a wasteful number, since it uses less digits than its factorization.

10931861780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11154984 (or 11154975 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 10931861780 in words is "ten billion, nine hundred thirty-one million, eight hundred sixty-one thousand, seven hundred eighty".