864856123032 has 64 divisors (see below), whose sum is σ = 2364465801600. Its totient is φ = 261436803840.

The previous prime is 864856123031. The next prime is 864856123069. The reversal of 864856123032 is 230321658468.

It is a super-2 number, since 2×864856123032² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864856123031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3896878 + ... + 4112829.

It is an arithmetic number, because the mean of its divisors is an integer number (36944778150).

Almost surely, 2^864856123032 is an apocalyptic number.

It is an amenable number.

864856123032 is an abundant number, since it is smaller than the sum of its proper divisors (1499609678568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864856123032 is a wasteful number, since it uses less digits than its factorization.

864856123032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010136 (or 8010132 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 864856123032 in words is "eight hundred sixty-four billion, eight hundred fifty-six million, one hundred twenty-three thousand, thirty-two".