856101659 has 4 divisors (see below), whose sum is σ = 978401904. Its totient is φ = 733801416.

The previous prime is 856101643. The next prime is 856101661. The reversal of 856101659 is 956101658.

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

It is a cyclic number.

It is not a de Polignac number, because 856101659 - 2⁴ = 856101643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856101559) 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, 61150112 + ... + 61150125.

It is an arithmetic number, because the mean of its divisors is an integer number (244600476).

Almost surely, 2^856101659 is an apocalyptic number.

856101659 is a deficient number, since it is larger than the sum of its proper divisors (122300245).

856101659 is a wasteful number, since it uses less digits than its factorization.

856101659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122300244.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 856101659 is about 29259.2149416214. The cubic root of 856101659 is about 949.5294655980.

Subtracting 856101659 from its reverse (956101658), we obtain a palindrome (99999999).

The spelling of 856101659 in words is "eight hundred fifty-six million, one hundred one thousand, six hundred fifty-nine".