877704785881 has 63 divisors (see below), whose sum is σ = 1173271895733. Its totient is φ = 654189902520.

The previous prime is 877704785861. The next prime is 877704785887. The reversal of 877704785881 is 188587407778.

The square root of 877704785881 is 936859.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 877704785881 - 2³⁷ = 740265832409 is a prime.

It is a super-2 number, since 2×877704785881² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 877704785881.

It is not an unprimeable number, because it can be changed into a prime (877704785887) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 38161077636 + ... + 38161077658.

Almost surely, 2^877704785881 is an apocalyptic number.

877704785881 is the 936859-th square number.

877704785881 is the 468430-th centered octagonal number.

It is an amenable number.

877704785881 is a deficient number, since it is larger than the sum of its proper divisors (295567109852).

877704785881 is an frugal number, since it uses more digits than its factorization.

877704785881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 196689920, while the sum is 70.

The spelling of 877704785881 in words is "eight hundred seventy-seven billion, seven hundred four million, seven hundred eighty-five thousand, eight hundred eighty-one".