877172189968 has 20 divisors (see below), whose sum is σ = 1716348062988. Its totient is φ = 434243657600.

The previous prime is 877172189963. The next prime is 877172190029. The reversal of 877172189968 is 869981271778.

It can be written as a sum of positive squares in 2 ways, for example, as 422723629584 + 454448560384 = 650172^2 + 674128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 877172189968.

It is not an unprimeable number, because it can be changed into a prime (877172189963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271400671 + ... + 271403902.

Almost surely, 2^877172189968 is an apocalyptic number.

It is an amenable number.

877172189968 is a deficient number, since it is larger than the sum of its proper divisors (839175873020).

877172189968 is a wasteful number, since it uses less digits than its factorization.

877172189968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542804682 (or 542804676 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 73.

The spelling of 877172189968 in words is "eight hundred seventy-seven billion, one hundred seventy-two million, one hundred eighty-nine thousand, nine hundred sixty-eight".