870245070689 has 4 divisors (see below), whose sum is σ = 891470560260. Its totient is φ = 849019581120.

The previous prime is 870245070659. The next prime is 870245070691. The reversal of 870245070689 is 986070542078.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61355290000 + 808889780689 = 247700^2 + 899383^2 .

It is a cyclic number.

It is not a de Polignac number, because 870245070689 - 2¹⁶ = 870245005153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870245070659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10612744724 + ... + 10612744805.

It is an arithmetic number, because the mean of its divisors is an integer number (222867640065).

Almost surely, 2^870245070689 is an apocalyptic number.

It is an amenable number.

870245070689 is a deficient number, since it is larger than the sum of its proper divisors (21225489571).

870245070689 is a wasteful number, since it uses less digits than its factorization.

870245070689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21225489570.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 870245070689 in words is "eight hundred seventy billion, two hundred forty-five million, seventy thousand, six hundred eighty-nine".