856648001 has 8 divisors (see below), whose sum is σ = 934737024. Its totient is φ = 778594320.

The previous prime is 856647977. The next prime is 856648007. The reversal of 856648001 is 100846658.

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 856648001 - 2²² = 852453697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856648007) 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, 89231 + ... + 98363.

It is an arithmetic number, because the mean of its divisors is an integer number (116842128).

Almost surely, 2^856648001 is an apocalyptic number.

It is an amenable number.

856648001 is a deficient number, since it is larger than the sum of its proper divisors (78089023).

856648001 is a wasteful number, since it uses less digits than its factorization.

856648001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17671.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 856648001 is about 29268.5496907517. The cubic root of 856648001 is about 949.7314110509.

The spelling of 856648001 in words is "eight hundred fifty-six million, six hundred forty-eight thousand, one".