36611378281 has 3 divisors (see below), whose sum is σ = 36611569623. Its totient is φ = 36611186940.

The previous prime is 36611378267. The next prime is 36611378291. The reversal of 36611378281 is 18287311663.

The square root of 36611378281 is 191341.

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., 35009777881 + 1601600400 = 187109^2 + 40020^2 .

It is not a de Polignac number, because 36611378281 - 2¹¹ = 36611376233 is a prime.

It is a super-2 number, since 2×36611378281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36611378201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 95671 + ... + 287011.

It is an arithmetic number, because the mean of its divisors is an integer number (12203856541).

Almost surely, 2^36611378281 is an apocalyptic number.

36611378281 is the 191341-st square number.

36611378281 is the 95671-st centered octagonal number.

It is an amenable number.

36611378281 is a deficient number, since it is larger than the sum of its proper divisors (191342).

36611378281 is an frugal number, since it uses more digits than its factorization.

36611378281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382682 (or 191341 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The spelling of 36611378281 in words is "thirty-six billion, six hundred eleven million, three hundred seventy-eight thousand, two hundred eighty-one".