856403071667 has 16 divisors (see below), whose sum is σ = 1006371233280. Its totient is φ = 718483245600.

The previous prime is 856403071627. The next prime is 856403071681. The reversal of 856403071667 is 766170304658.

It is a cyclic number.

It is not a de Polignac number, because 856403071667 - 2¹⁴ = 856403055283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856403071627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150809 + ... + 1317402.

It is an arithmetic number, because the mean of its divisors is an integer number (62898202080).

Almost surely, 2^856403071667 is an apocalyptic number.

856403071667 is a deficient number, since it is larger than the sum of its proper divisors (149968161613).

856403071667 is a wasteful number, since it uses less digits than its factorization.

856403071667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472314.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 856403071667 in words is "eight hundred fifty-six billion, four hundred three million, seventy-one thousand, six hundred sixty-seven".