864060561558 has 48 divisors (see below), whose sum is σ = 1875933146880. Its totient is φ = 287435524608.

The previous prime is 864060561541. The next prime is 864060561589. The reversal of 864060561558 is 855165060468.

864060561558 is a `hidden beast` number, since 86 + 4 + 0 + 6 + 0 + 5 + 6 + 1 + 558 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60940966 + ... + 60955142.

It is an arithmetic number, because the mean of its divisors is an integer number (39081940560).

Almost surely, 2^864060561558 is an apocalyptic number.

864060561558 is an abundant number, since it is smaller than the sum of its proper divisors (1011872585322).

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

864060561558 is a wasteful number, since it uses less digits than its factorization.

864060561558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20821 (or 20818 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The spelling of 864060561558 in words is "eight hundred sixty-four billion, sixty million, five hundred sixty-one thousand, five hundred fifty-eight".