856653477 has 8 divisors (see below), whose sum is σ = 1209393216. Its totient is φ = 537508032.

The previous prime is 856653451. The next prime is 856653503. The reversal of 856653477 is 774356658.

It is an interprime number because it is at equal distance from previous prime (856653451) and next prime (856653503).

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

It is not a de Polignac number, because 856653477 - 2¹¹ = 856651429 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 16797127 = 856653477 / (8 + 5 + 6 + 6 + 5 + 3 + 4 + 7 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856653407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8398513 + ... + 8398614.

It is an arithmetic number, because the mean of its divisors is an integer number (151174152).

Almost surely, 2^856653477 is an apocalyptic number.

It is an amenable number.

856653477 is a deficient number, since it is larger than the sum of its proper divisors (352739739).

856653477 is a wasteful number, since it uses less digits than its factorization.

856653477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16797147.

The product of its digits is 4233600, while the sum is 51.

The square root of 856653477 is about 29268.6432381141. The cubic root of 856653477 is about 949.7334347207.

The spelling of 856653477 in words is "eight hundred fifty-six million, six hundred fifty-three thousand, four hundred seventy-seven".