849427688581 has 4 divisors (see below), whose sum is σ = 855053037664. Its totient is φ = 843802339500.

The previous prime is 849427688573. The next prime is 849427688597. The reversal of 849427688581 is 185886724948.

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 not a de Polignac number, because 849427688581 - 2³ = 849427688573 is a prime.

It is a super-2 number, since 2×849427688581² (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 849427688581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849427689581) 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, 2812674315 + ... + 2812674616.

It is an arithmetic number, because the mean of its divisors is an integer number (213763259416).

Almost surely, 2^849427688581 is an apocalyptic number.

It is an amenable number.

849427688581 is a deficient number, since it is larger than the sum of its proper divisors (5625349083).

849427688581 is a wasteful number, since it uses less digits than its factorization.

849427688581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625349082.

The product of its digits is 247726080, while the sum is 70.

The spelling of 849427688581 in words is "eight hundred forty-nine billion, four hundred twenty-seven million, six hundred eighty-eight thousand, five hundred eighty-one".