36168812761 has 3 divisors (see below), whose sum is σ = 36169002943. Its totient is φ = 36168622580.

The previous prime is 36168812759. The next prime is 36168812837. The reversal of 36168812761 is 16721886163.

It is a happy number.

The square root of 36168812761 is 190181.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 23798924361 + 12369888400 = 154269^2 + 111220^2 .

It is not a de Polignac number, because 36168812761 - 2¹ = 36168812759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36168812741) 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 2 ways as a sum of consecutive naturals, for example, 95091 + ... + 285271.

Almost surely, 2^36168812761 is an apocalyptic number.

36168812761 is the 190181-st square number.

36168812761 is the 95091-st centered octagonal number.

It is an amenable number.

36168812761 is a deficient number, since it is larger than the sum of its proper divisors (190182).

36168812761 is an frugal number, since it uses more digits than its factorization.

36168812761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380362 (or 190181 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

Multiplying 36168812761 by its sum of digits (49), we get a square (1772271825289 = 1331267²).

The spelling of 36168812761 in words is "thirty-six billion, one hundred sixty-eight million, eight hundred twelve thousand, seven hundred sixty-one".