10864856819 has 4 divisors (see below), whose sum is σ = 10865317944. Its totient is φ = 10864395696.

The previous prime is 10864856803. The next prime is 10864856833. The reversal of 10864856819 is 91865846801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91865846801 = 23911 ⋅3841991.

It is a cyclic number.

It is not a de Polignac number, because 10864856819 - 2⁴ = 10864856803 is a prime.

It is a super-2 number, since 2×10864856819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10864855819) 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, 193202 + ... + 243015.

It is an arithmetic number, because the mean of its divisors is an integer number (2716329486).

Almost surely, 2^10864856819 is an apocalyptic number.

10864856819 is a deficient number, since it is larger than the sum of its proper divisors (461125).

10864856819 is an equidigital number, since it uses as much as digits as its factorization.

10864856819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461124.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 10864856819 in words is "ten billion, eight hundred sixty-four million, eight hundred fifty-six thousand, eight hundred nineteen".