867213128227512 has 128 divisors (see below), whose sum is σ = 2388613847558400. Its totient is φ = 260182328064000.

The previous prime is 867213128227499. The next prime is 867213128227541. The reversal of 867213128227512 is 215722821312768.

It is a happy number.

It is a congruent number.

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, 943953088 + ... + 944871344.

It is an arithmetic number, because the mean of its divisors is an integer number (18661045684050).

Almost surely, 2^{867213128227512} 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 867213128227512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194306923779200).

867213128227512 is an abundant number, since it is smaller than the sum of its proper divisors (1521400719330888).

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

867213128227512 is a wasteful number, since it uses less digits than its factorization.

867213128227512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953797 (or 953793 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The spelling of 867213128227512 in words is "eight hundred sixty-seven trillion, two hundred thirteen billion, one hundred twenty-eight million, two hundred twenty-seven thousand, five hundred twelve".