131567245656 has 128 divisors (see below), whose sum is σ = 411676853760. Its totient is φ = 34040217600.

The previous prime is 131567245643. The next prime is 131567245657. The reversal of 131567245656 is 656542765131.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 131567245599 and 131567245608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131567245657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336426 + ... + 613446.

It is an arithmetic number, because the mean of its divisors is an integer number (3216225420).

Almost surely, 2^131567245656 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 131567245656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205838426880).

131567245656 is an abundant number, since it is smaller than the sum of its proper divisors (280109608104).

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

131567245656 is a wasteful number, since it uses less digits than its factorization.

131567245656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277305 (or 277301 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 51.

The spelling of 131567245656 in words is "one hundred thirty-one billion, five hundred sixty-seven million, two hundred forty-five thousand, six hundred fifty-six".