869555271489 has 4 divisors (see below), whose sum is σ = 1159407028656. Its totient is φ = 579703514324.

The previous prime is 869555271469. The next prime is 869555271509. The reversal of 869555271489 is 984172555968.

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 an interprime number because it is at equal distance from previous prime (869555271469) and next prime (869555271509).

It is a cyclic number.

It is not a de Polignac number, because 869555271489 - 2²¹ = 869553174337 is a prime.

It is a super-2 number, since 2×869555271489² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (869555271419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144925878579 + ... + 144925878584.

It is an arithmetic number, because the mean of its divisors is an integer number (289851757164).

Almost surely, 2^869555271489 is an apocalyptic number.

It is an amenable number.

869555271489 is a deficient number, since it is larger than the sum of its proper divisors (289851757167).

869555271489 is a wasteful number, since it uses less digits than its factorization.

869555271489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289851757166.

The product of its digits is 217728000, while the sum is 69.

The spelling of 869555271489 in words is "eight hundred sixty-nine billion, five hundred fifty-five million, two hundred seventy-one thousand, four hundred eighty-nine".