181132077757 has 4 divisors (see below), whose sum is σ = 186027539356. Its totient is φ = 176236616160.

The previous prime is 181132077701. The next prime is 181132077787. The reversal of 181132077757 is 757770231181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 757770231181 = 418861 ⋅1809121.

It can be written as a sum of positive squares in 2 ways, for example, as 146919656601 + 34212421156 = 383301^2 + 184966^2 .

It is a cyclic number.

It is not a de Polignac number, because 181132077757 - 2³¹ = 178984594109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181132077757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181132077787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447730744 + ... + 2447730817.

It is an arithmetic number, because the mean of its divisors is an integer number (46506884839).

Almost surely, 2^181132077757 is an apocalyptic number.

It is an amenable number.

181132077757 is a deficient number, since it is larger than the sum of its proper divisors (4895461599).

181132077757 is an equidigital number, since it uses as much as digits as its factorization.

181132077757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4895461598.

The product of its (nonzero) digits is 576240, while the sum is 49.

The spelling of 181132077757 in words is "one hundred eighty-one billion, one hundred thirty-two million, seventy-seven thousand, seven hundred fifty-seven".