866138158358312 has 48 divisors (see below), whose sum is σ = 1889502002352000. Its totient is φ = 371133566852832.

The previous prime is 866138158358287. The next prime is 866138158358321. The reversal of 866138158358312 is 213853851831668.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201745112 + ... + 205993607.

It is an arithmetic number, because the mean of its divisors is an integer number (39364625049000).

Almost surely, 2^{866138158358312} is an apocalyptic number.

It is an amenable number.

866138158358312 is an abundant number, since it is smaller than the sum of its proper divisors (1023363843993688).

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

866138158358312 is a wasteful number, since it uses less digits than its factorization.

866138158358312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407744158 (or 407744147 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 68.

The spelling of 866138158358312 in words is "eight hundred sixty-six trillion, one hundred thirty-eight billion, one hundred fifty-eight million, three hundred fifty-eight thousand, three hundred twelve".