36136681 has 4 divisors (see below), whose sum is σ = 41299072. Its totient is φ = 30974292.

The previous prime is 36136673. The next prime is 36136691. The reversal of 36136681 is 18663163.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36136681 - 2³ = 36136673 is a prime.

It is a super-2 number, since 2×36136681² = 2611719427391522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36136631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2581185 + ... + 2581198.

It is an arithmetic number, because the mean of its divisors is an integer number (10324768).

Almost surely, 2^36136681 is an apocalyptic number.

It is an amenable number.

36136681 is a deficient number, since it is larger than the sum of its proper divisors (5162391).

36136681 is an equidigital number, since it uses as much as digits as its factorization.

36136681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162390.

The product of its digits is 15552, while the sum is 34.

The square root of 36136681 is about 6011.3792926416. The cubic root of 36136681 is about 330.6100774423.

The spelling of 36136681 in words is "thirty-six million, one hundred thirty-six thousand, six hundred eighty-one".