131522689656 has 256 divisors, whose sum is σ = 396063360000. Its totient is φ = 40298466816.

The previous prime is 131522689633. The next prime is 131522689657. The reversal of 131522689656 is 656986225131.

131522689656 is a `hidden beast` number, since 1 + 3 + 1 + 522 + 68 + 9 + 6 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131522689657) 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, 66660286 + ... + 66662258.

It is an arithmetic number, because the mean of its divisors is an integer number (1547122500).

Almost surely, 2^131522689656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131522689656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198031680000).

131522689656 is an abundant number, since it is smaller than the sum of its proper divisors (264540670344).

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

131522689656 is a wasteful number, since it uses less digits than its factorization.

131522689656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2473 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 131522689656 in words is "one hundred thirty-one billion, five hundred twenty-two million, six hundred eighty-nine thousand, six hundred fifty-six".