131781766855355 has 32 divisors (see below), whose sum is σ = 159283200384000. Its totient is φ = 104664994018560.

The previous prime is 131781766855351. The next prime is 131781766855391. The reversal of 131781766855355 is 553558667187131.

It is not a de Polignac number, because 131781766855355 - 2² = 131781766855351 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (131781766855351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 697100807 + ... + 697289823.

It is an arithmetic number, because the mean of its divisors is an integer number (4977600012000).

Almost surely, 2^{131781766855355} is an apocalyptic number.

131781766855355 is a deficient number, since it is larger than the sum of its proper divisors (27501433528645).

131781766855355 is a wasteful number, since it uses less digits than its factorization.

131781766855355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190979.

The product of its digits is 635040000, while the sum is 71.

The spelling of 131781766855355 in words is "one hundred thirty-one trillion, seven hundred eighty-one billion, seven hundred sixty-six million, eight hundred fifty-five thousand, three hundred fifty-five".