131806656000 has 640 divisors, whose sum is σ = 493318425600. Its totient is φ = 34687180800.

The previous prime is 131806655861. The next prime is 131806656001. The reversal of 131806656000 is 656608131.

It is a happy number.

131806656000 is a `hidden beast` number, since 1 + 31 + 8 + 0 + 66 + 560 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131806656001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143423541 + ... + 143424459.

It is an arithmetic number, because the mean of its divisors is an integer number (770810040).

Almost surely, 2^131806656000 is an apocalyptic number.

131806656000 is a gapful number since it is divisible by the number (10) 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 131806656000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246659212800).

131806656000 is an abundant number, since it is smaller than the sum of its proper divisors (361511769600).

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

131806656000 is an frugal number, since it uses more digits than its factorization.

131806656000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1012 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 131806656000 in words is "one hundred thirty-one billion, eight hundred six million, six hundred fifty-six thousand".