868391564 has 6 divisors (see below), whose sum is σ = 1519685244. Its totient is φ = 434195780.

The previous prime is 868391551. The next prime is 868391581. The reversal of 868391564 is 465193868.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108548942 + ... + 108548949.

It is an arithmetic number, because the mean of its divisors is an integer number (253280874).

Almost surely, 2^868391564 is an apocalyptic number.

It is an amenable number.

868391564 is a deficient number, since it is larger than the sum of its proper divisors (651293680).

868391564 is a wasteful number, since it uses less digits than its factorization.

868391564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217097895 (or 217097893 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 868391564 is about 29468.4842501273. The cubic root of 868391564 is about 954.0516023521.

The spelling of 868391564 in words is "eight hundred sixty-eight million, three hundred ninety-one thousand, five hundred sixty-four".