865422655 has 8 divisors (see below), whose sum is σ = 1099595952. Its totient is φ = 651612288.

The previous prime is 865422617. The next prime is 865422709. The reversal of 865422655 is 556224568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865422655 - 2⁹ = 865422143 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 7 ways as a sum of consecutive naturals, for example, 5090637 + ... + 5090806.

It is an arithmetic number, because the mean of its divisors is an integer number (137449494).

Almost surely, 2^865422655 is an apocalyptic number.

865422655 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

865422655 is a deficient number, since it is larger than the sum of its proper divisors (234173297).

865422655 is a wasteful number, since it uses less digits than its factorization.

865422655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181465.

The product of its digits is 576000, while the sum is 43.

The square root of 865422655 is about 29418.0668127598. The cubic root of 865422655 is about 952.9631047142.

The spelling of 865422655 in words is "eight hundred sixty-five million, four hundred twenty-two thousand, six hundred fifty-five".