867021542872 has 8 divisors (see below), whose sum is σ = 1625665392900. Its totient is φ = 433510771432.

The previous prime is 867021542869. The next prime is 867021542873. The reversal of 867021542872 is 278245120768.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867021542873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54188846422 + ... + 54188846437.

Almost surely, 2^867021542872 is an apocalyptic number.

It is an amenable number.

867021542872 is a deficient number, since it is larger than the sum of its proper divisors (758643850028).

867021542872 is a wasteful number, since it uses less digits than its factorization.

867021542872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108377692865 (or 108377692861 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 867021542872 in words is "eight hundred sixty-seven billion, twenty-one million, five hundred forty-two thousand, eight hundred seventy-two".