864587110920 has 128 divisors (see below), whose sum is σ = 2798042970240. Its totient is φ = 212458659840.

The previous prime is 864587110903. The next prime is 864587110949. The reversal of 864587110920 is 29011785468.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443640 + ... + 1387800.

It is an arithmetic number, because the mean of its divisors is an integer number (21859710705).

Almost surely, 2^864587110920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864587110920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399021485120).

864587110920 is an abundant number, since it is smaller than the sum of its proper divisors (1933455859320).

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

864587110920 is a wasteful number, since it uses less digits than its factorization.

864587110920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944775 (or 944771 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 864587110920 in words is "eight hundred sixty-four billion, five hundred eighty-seven million, one hundred ten thousand, nine hundred twenty".