10976778581 has 2 divisors, whose sum is σ = 10976778582. Its totient is φ = 10976778580.

The previous prime is 10976778577. The next prime is 10976778583. The reversal of 10976778581 is 18587767901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10392783025 + 583995556 = 101945^2 + 24166^2 .

It is a cyclic number.

It is not a de Polignac number, because 10976778581 - 2² = 10976778577 is a prime.

It is a super-2 number, since 2×10976778581² (a number of 21 digits) contains 22 as substring.

Together with 10976778583, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10976778581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10976778583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5488389290 + 5488389291.

It is an arithmetic number, because the mean of its divisors is an integer number (5488389291).

Almost surely, 2^10976778581 is an apocalyptic number.

It is an amenable number.

10976778581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10976778581 is an equidigital number, since it uses as much as digits as its factorization.

10976778581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 59.

The spelling of 10976778581 in words is "ten billion, nine hundred seventy-six million, seven hundred seventy-eight thousand, five hundred eighty-one".