131551216726 has 32 divisors (see below), whose sum is σ = 204946080768. Its totient is φ = 63289074240.

The previous prime is 131551216721. The next prime is 131551216729. The reversal of 131551216726 is 627612155131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131551216721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2103261 + ... + 2164903.

It is an arithmetic number, because the mean of its divisors is an integer number (6404565024).

Almost surely, 2^131551216726 is an apocalyptic number.

131551216726 is a deficient number, since it is larger than the sum of its proper divisors (73394864042).

131551216726 is a wasteful number, since it uses less digits than its factorization.

131551216726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62076.

The product of its digits is 75600, while the sum is 40.

It can be divided in two parts, 13155 and 1216726, that added together give a square (1229881 = 1109²).

The spelling of 131551216726 in words is "one hundred thirty-one billion, five hundred fifty-one million, two hundred sixteen thousand, seven hundred twenty-six".