36993888881 has 2 divisors, whose sum is σ = 36993888882. Its totient is φ = 36993888880.

The previous prime is 36993888863. The next prime is 36993888917. The reversal of 36993888881 is 18888839963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35214399025 + 1779489856 = 187655^2 + 42184^2 .

It is a cyclic number.

It is not a de Polignac number, because 36993888881 - 2¹⁰ = 36993887857 is a prime.

It is a super-2 number, since 2×36993888881² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (36993888851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18496944440 + 18496944441.

It is an arithmetic number, because the mean of its divisors is an integer number (18496944441).

Almost surely, 2^36993888881 is an apocalyptic number.

It is an amenable number.

36993888881 is a deficient number, since it is larger than the sum of its proper divisors (1).

36993888881 is an equidigital number, since it uses as much as digits as its factorization.

36993888881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143327232, while the sum is 71.

The spelling of 36993888881 in words is "thirty-six billion, nine hundred ninety-three million, eight hundred eighty-eight thousand, eight hundred eighty-one".