12195526656 has 96 divisors (see below), whose sum is σ = 34225027200. Its totient is φ = 3851182080.

The previous prime is 12195526639. The next prime is 12195526661. The reversal of 12195526656 is 65662559121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64501 + ... + 168971.

It is an arithmetic number, because the mean of its divisors is an integer number (356510700).

Almost surely, 2^12195526656 is an apocalyptic number.

12195526656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12195526656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17112513600).

12195526656 is an abundant number, since it is smaller than the sum of its proper divisors (22029500544).

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

12195526656 is a wasteful number, since it uses less digits than its factorization.

12195526656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104515 (or 104495 counting only the distinct ones).

The product of its digits is 972000, while the sum is 48.

The spelling of 12195526656 in words is "twelve billion, one hundred ninety-five million, five hundred twenty-six thousand, six hundred fifty-six".