10864856821 has 8 divisors (see below), whose sum is σ = 13372131584. Its totient is φ = 8596370160.

The previous prime is 10864856803. The next prime is 10864856833. The reversal of 10864856821 is 12865846801.

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

It is not a de Polignac number, because 10864856821 - 2⁵ = 10864856789 is a prime.

It is a super-2 number, since 2×10864856821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10864856861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59696925 + ... + 59697106.

It is an arithmetic number, because the mean of its divisors is an integer number (1671516448).

Almost surely, 2^10864856821 is an apocalyptic number.

It is an amenable number.

10864856821 is a deficient number, since it is larger than the sum of its proper divisors (2507274763).

10864856821 is a wasteful number, since it uses less digits than its factorization.

10864856821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119394051.

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 10864856821 in words is "ten billion, eight hundred sixty-four million, eight hundred fifty-six thousand, eight hundred twenty-one".