12271658856 has 16 divisors (see below), whose sum is σ = 30679147200. Its totient is φ = 4090552944.

The previous prime is 12271658843. The next prime is 12271658869. The reversal of 12271658856 is 65885617221.

It is an interprime number because it is at equal distance from previous prime (12271658843) and next prime (12271658869).

It is a super-2 number, since 2×12271658856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12271658799 and 12271658808.

It is an unprimeable number.

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, 255659536 + ... + 255659583.

It is an arithmetic number, because the mean of its divisors is an integer number (1917446700).

Almost surely, 2^12271658856 is an apocalyptic number.

It is an amenable number.

12271658856 is an abundant number, since it is smaller than the sum of its proper divisors (18407488344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12271658856 is a wasteful number, since it uses less digits than its factorization.

12271658856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511319128 (or 511319124 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The spelling of 12271658856 in words is "twelve billion, two hundred seventy-one million, six hundred fifty-eight thousand, eight hundred fifty-six".