181136497936 has 10 divisors (see below), whose sum is σ = 350951964782. Its totient is φ = 90568248960.

The previous prime is 181136497933. The next prime is 181136497939. The reversal of 181136497936 is 639794631181.

It is an interprime number because it is at equal distance from previous prime (181136497933) and next prime (181136497939).

It can be written as a sum of positive squares in only one way, i.e., 177695971600 + 3440526336 = 421540^2 + 58656^2 .

It is not an unprimeable number, because it can be changed into a prime (181136497933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660515545 + ... + 5660515576.

Almost surely, 2^181136497936 is an apocalyptic number.

181136497936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

181136497936 is a deficient number, since it is larger than the sum of its proper divisors (169815466846).

181136497936 is a wasteful number, since it uses less digits than its factorization.

181136497936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321031129 (or 11321031123 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 58.

The spelling of 181136497936 in words is "one hundred eighty-one billion, one hundred thirty-six million, four hundred ninety-seven thousand, nine hundred thirty-six".