870643725617172 has 48 divisors (see below), whose sum is σ = 2187847039521920. Its totient is φ = 267881116733568.

The previous prime is 870643725617101. The next prime is 870643725617177. The reversal of 870643725617172 is 271716527346078.

It is a happy number.

870643725617172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870643725617177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91934272 + ... + 100961367.

Almost surely, 2^{870643725617172} is an apocalyptic number.

It is an amenable number.

870643725617172 is an abundant number, since it is smaller than the sum of its proper divisors (1317203313904748).

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

870643725617172 is a wasteful number, since it uses less digits than its factorization.

870643725617172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192924592 (or 192924590 counting only the distinct ones).

The product of its (nonzero) digits is 165957120, while the sum is 66.

The spelling of 870643725617172 in words is "eight hundred seventy trillion, six hundred forty-three billion, seven hundred twenty-five million, six hundred seventeen thousand, one hundred seventy-two".