12331661005620 has 144 divisors (see below), whose sum is σ = 43206974935488. Its totient is φ = 2813641006080.

The previous prime is 12331661005583. The next prime is 12331661005711. The reversal of 12331661005620 is 2650016613321.

12331661005620 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 16 + 6 + 10 + 0 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 183146094 + ... + 183213413.

It is an arithmetic number, because the mean of its divisors is an integer number (300048437052).

Almost surely, 2^{12331661005620} is an apocalyptic number.

12331661005620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331661005620 is an abundant number, since it is smaller than the sum of its proper divisors (30875313929868).

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

12331661005620 is a wasteful number, since it uses less digits than its factorization.

12331661005620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366359550 (or 366359545 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 12331661005620 its reverse (2650016613321), we get a palindrome (14981677618941).

The spelling of 12331661005620 in words is "twelve trillion, three hundred thirty-one billion, six hundred sixty-one million, five thousand, six hundred twenty".