12271891558 has 32 divisors (see below), whose sum is σ = 20044000800. Its totient is φ = 5613256704.

The previous prime is 12271891547. The next prime is 12271891559. The reversal of 12271891558 is 85519817221.

It is a happy number.

It is a super-2 number, since 2×12271891558² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12271891559) 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 15 ways as a sum of consecutive naturals, for example, 144166 + ... + 212902.

It is an arithmetic number, because the mean of its divisors is an integer number (626375025).

Almost surely, 2^12271891558 is an apocalyptic number.

12271891558 is a deficient number, since it is larger than the sum of its proper divisors (7772109242).

12271891558 is a wasteful number, since it uses less digits than its factorization.

12271891558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68904.

The product of its digits is 403200, while the sum is 49.

The spelling of 12271891558 in words is "twelve billion, two hundred seventy-one million, eight hundred ninety-one thousand, five hundred fifty-eight".