10856909289 has 4 divisors (see below), whose sum is σ = 14475879056. Its totient is φ = 7237939524.

The previous prime is 10856909269. The next prime is 10856909293. The reversal of 10856909289 is 98290965801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10856909289 - 2¹⁵ = 10856876521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10856909209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1809484879 + ... + 1809484884.

It is an arithmetic number, because the mean of its divisors is an integer number (3618969764).

Almost surely, 2^10856909289 is an apocalyptic number.

It is an amenable number.

10856909289 is a deficient number, since it is larger than the sum of its proper divisors (3618969767).

10856909289 is an equidigital number, since it uses as much as digits as its factorization.

10856909289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618969766.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 10856909289 in words is "ten billion, eight hundred fifty-six million, nine hundred nine thousand, two hundred eighty-nine".