868657255 has 4 divisors (see below), whose sum is σ = 1042388712. Its totient is φ = 694925800.

The previous prime is 868657241. The next prime is 868657277. The reversal of 868657255 is 552756868.

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

It is not a de Polignac number, because 868657255 - 2²⁵ = 835102823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86865721 + ... + 86865730.

It is an arithmetic number, because the mean of its divisors is an integer number (260597178).

Almost surely, 2^868657255 is an apocalyptic number.

868657255 is a deficient number, since it is larger than the sum of its proper divisors (173731457).

868657255 is a wasteful number, since it uses less digits than its factorization.

868657255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173731456.

The product of its digits is 4032000, while the sum is 52.

The square root of 868657255 is about 29472.9919587408. The cubic root of 868657255 is about 954.1488922106.

The spelling of 868657255 in words is "eight hundred sixty-eight million, six hundred fifty-seven thousand, two hundred fifty-five".