36681124778 has 4 divisors (see below), whose sum is σ = 55021687170. Its totient is φ = 18340562388.

The previous prime is 36681124769. The next prime is 36681124783. The reversal of 36681124778 is 87742118663.

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: 87742118663 = 73 ⋅1201946831.

It can be written as a sum of positive squares in only one way, i.e., 22904703649 + 13776421129 = 151343^2 + 117373^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9170281193 + ... + 9170281196.

Almost surely, 2^36681124778 is an apocalyptic number.

36681124778 is a deficient number, since it is larger than the sum of its proper divisors (18340562392).

36681124778 is a wasteful number, since it uses less digits than its factorization.

36681124778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340562391.

The product of its digits is 2709504, while the sum is 53.

The spelling of 36681124778 in words is "thirty-six billion, six hundred eighty-one million, one hundred twenty-four thousand, seven hundred seventy-eight".