131776604576081 has 2 divisors, whose sum is σ = 131776604576082. Its totient is φ = 131776604576080.

The previous prime is 131776604576053. The next prime is 131776604576129. The reversal of 131776604576081 is 180675406677131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101089270227856 + 30687334348225 = 10054316^2 + 5539615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131776604576081 is a prime.

It is a super-2 number, since 2×131776604576081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131776604576011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65888302288040 + 65888302288041.

It is an arithmetic number, because the mean of its divisors is an integer number (65888302288041).

Almost surely, 2^{131776604576081} is an apocalyptic number.

It is an amenable number.

131776604576081 is a deficient number, since it is larger than the sum of its proper divisors (1).

131776604576081 is an equidigital number, since it uses as much as digits as its factorization.

131776604576081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35562240, while the sum is 62.

The spelling of 131776604576081 in words is "one hundred thirty-one trillion, seven hundred seventy-six billion, six hundred four million, five hundred seventy-six thousand, eighty-one".