856945756067 has 4 divisors (see below), whose sum is σ = 863487326856. Its totient is φ = 850404185280.

The previous prime is 856945756039. The next prime is 856945756129. The reversal of 856945756067 is 760657549658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 760657549658 = 2 ⋅380328774829.

It is a cyclic number.

It is not a de Polignac number, because 856945756067 - 2³⁸ = 582067849123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856945755988 and 856945756006.

It is not an unprimeable number, because it can be changed into a prime (856945756867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3270785198 + ... + 3270785459.

It is an arithmetic number, because the mean of its divisors is an integer number (215871831714).

Almost surely, 2^856945756067 is an apocalyptic number.

856945756067 is a deficient number, since it is larger than the sum of its proper divisors (6541570789).

856945756067 is a wasteful number, since it uses less digits than its factorization.

856945756067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541570788.

The product of its (nonzero) digits is 381024000, while the sum is 68.

The spelling of 856945756067 in words is "eight hundred fifty-six billion, nine hundred forty-five million, seven hundred fifty-six thousand, sixty-seven".