864856254028 has 48 divisors (see below), whose sum is σ = 1729216491520. Its totient is φ = 375178112064.

The previous prime is 864856253957. The next prime is 864856254029. The reversal of 864856254028 is 820452658468.

864856254028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (864856254029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3320826 + ... + 3571777.

Almost surely, 2^864856254028 is an apocalyptic number.

It is an amenable number.

864856254028 is a deficient number, since it is larger than the sum of its proper divisors (864360237492).

864856254028 is a wasteful number, since it uses less digits than its factorization.

864856254028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892766 (or 6892764 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 58.

The spelling of 864856254028 in words is "eight hundred sixty-four billion, eight hundred fifty-six million, two hundred fifty-four thousand, twenty-eight".