855048696609 has 4 divisors (see below), whose sum is σ = 1140064928816. Its totient is φ = 570032464404.

The previous prime is 855048696599. The next prime is 855048696611. The reversal of 855048696609 is 906696840558.

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 de Polignac number, because none of the positive numbers 2^k-855048696609 is a prime.

It is a super-2 number, since 2×855048696609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855048696609.

It is not an unprimeable number, because it can be changed into a prime (855048696679) 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, 142508116099 + ... + 142508116104.

It is an arithmetic number, because the mean of its divisors is an integer number (285016232204).

Almost surely, 2^855048696609 is an apocalyptic number.

It is an amenable number.

855048696609 is a deficient number, since it is larger than the sum of its proper divisors (285016232207).

855048696609 is a wasteful number, since it uses less digits than its factorization.

855048696609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285016232206.

The product of its (nonzero) digits is 111974400, while the sum is 66.

The spelling of 855048696609 in words is "eight hundred fifty-five billion, forty-eight million, six hundred ninety-six thousand, six hundred nine".