856088641 has 4 divisors (see below), whose sum is σ = 856172884. Its totient is φ = 856004400.

The previous prime is 856088621. The next prime is 856088657. The reversal of 856088641 is 146880658.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 313431616 + 542657025 = 17704^2 + 23295^2 .

It is a cyclic number.

It is not a de Polignac number, because 856088641 - 2⁵ = 856088609 is a prime.

It is a super-2 number, since 2×856088641² = 1465775522498453762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856088591 and 856088600.

It is not an unprimeable number, because it can be changed into a prime (856088621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24390 + ... + 48031.

It is an arithmetic number, because the mean of its divisors is an integer number (214043221).

Almost surely, 2^856088641 is an apocalyptic number.

It is an amenable number.

856088641 is a deficient number, since it is larger than the sum of its proper divisors (84243).

856088641 is a wasteful number, since it uses less digits than its factorization.

856088641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84242.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 856088641 is about 29258.9924809451. The cubic root of 856088641 is about 949.5246526816.

It can be divided in two parts, 85608 and 8641, that added together give a palindrome (94249).

The spelling of 856088641 in words is "eight hundred fifty-six million, eighty-eight thousand, six hundred forty-one".