10806820557 has 8 divisors (see below), whose sum is σ = 15517485984. Its totient is φ = 6650351088.

The previous prime is 10806820517. The next prime is 10806820579. The reversal of 10806820557 is 75502860801.

10806820557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10806820557 - 2¹⁰ = 10806819533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10806820517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 138548943 + ... + 138549020.

It is an arithmetic number, because the mean of its divisors is an integer number (1939685748).

Almost surely, 2^10806820557 is an apocalyptic number.

It is an amenable number.

10806820557 is a deficient number, since it is larger than the sum of its proper divisors (4710665427).

10806820557 is a wasteful number, since it uses less digits than its factorization.

10806820557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277097979.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 10806820557 in words is "ten billion, eight hundred six million, eight hundred twenty thousand, five hundred fifty-seven".