864887986416 has 40 divisors (see below), whose sum is σ = 2259398402640. Its totient is φ = 285056713216.

The previous prime is 864887986393. The next prime is 864887986463. The reversal of 864887986416 is 614689788468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101223255 + ... + 101231798.

It is an arithmetic number, because the mean of its divisors is an integer number (56484960066).

Almost surely, 2^864887986416 is an apocalyptic number.

It is an amenable number.

864887986416 is an abundant number, since it is smaller than the sum of its proper divisors (1394510416224).

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

864887986416 is a wasteful number, since it uses less digits than its factorization.

864887986416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202455153 (or 202455147 counting only the distinct ones).

The product of its digits is 891813888, while the sum is 75.

The spelling of 864887986416 in words is "eight hundred sixty-four billion, eight hundred eighty-seven million, nine hundred eighty-six thousand, four hundred sixteen".