869605655 has 4 divisors (see below), whose sum is σ = 1043526792. Its totient is φ = 695684520.

The previous prime is 869605621. The next prime is 869605673. The reversal of 869605655 is 556506968.

869605655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 869605655 - 2²⁶ = 802496791 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, 86960561 + ... + 86960570.

It is an arithmetic number, because the mean of its divisors is an integer number (260881698).

Almost surely, 2^869605655 is an apocalyptic number.

869605655 is a deficient number, since it is larger than the sum of its proper divisors (173921137).

869605655 is a wasteful number, since it uses less digits than its factorization.

869605655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173921136.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The square root of 869605655 is about 29489.0768760231. The cubic root of 869605655 is about 954.4960125027.

The spelling of 869605655 in words is "eight hundred sixty-nine million, six hundred five thousand, six hundred fifty-five".