856077605 has 4 divisors (see below), whose sum is σ = 1027293132. Its totient is φ = 684862080.

The previous prime is 856077587. The next prime is 856077611. The reversal of 856077605 is 506770658.

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

It can be written as a sum of positive squares in 2 ways, for example, as 240343009 + 615734596 = 15503^2 + 24814^2 .

It is not a de Polignac number, because 856077605 - 2⁸ = 856077349 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, 85607756 + ... + 85607765.

It is an arithmetic number, because the mean of its divisors is an integer number (256823283).

Almost surely, 2^856077605 is an apocalyptic number.

It is an amenable number.

856077605 is a deficient number, since it is larger than the sum of its proper divisors (171215527).

856077605 is a wasteful number, since it uses less digits than its factorization.

856077605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171215526.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 856077605 is about 29258.8038887443. The cubic root of 856077605 is about 949.5205724970.

The spelling of 856077605 in words is "eight hundred fifty-six million, seventy-seven thousand, six hundred five".