856766490269 has 4 divisors (see below), whose sum is σ = 856770700800. Its totient is φ = 856762279740.

The previous prime is 856766490193. The next prime is 856766490323. The reversal of 856766490269 is 962094667658.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856766490269 is a prime.

It is a super-2 number, since 2×856766490269² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856766490199 and 856766490208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856766990269) 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, 1783667 + ... + 2212464.

It is an arithmetic number, because the mean of its divisors is an integer number (214192675200).

Almost surely, 2^856766490269 is an apocalyptic number.

It is an amenable number.

856766490269 is a deficient number, since it is larger than the sum of its proper divisors (4210531).

856766490269 is a wasteful number, since it uses less digits than its factorization.

856766490269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210530.

The product of its (nonzero) digits is 235146240, while the sum is 68.

The spelling of 856766490269 in words is "eight hundred fifty-six billion, seven hundred sixty-six million, four hundred ninety thousand, two hundred sixty-nine".