36640655 has 4 divisors (see below), whose sum is σ = 43968792. Its totient is φ = 29312520.

The previous prime is 36640651. The next prime is 36640663. The reversal of 36640655 is 55604663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55604663 = 337 ⋅164999.

It is not a de Polignac number, because 36640655 - 2² = 36640651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36640651) 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, 3664061 + ... + 3664070.

It is an arithmetic number, because the mean of its divisors is an integer number (10992198).

Almost surely, 2^36640655 is an apocalyptic number.

36640655 is a deficient number, since it is larger than the sum of its proper divisors (7328137).

36640655 is an equidigital number, since it uses as much as digits as its factorization.

36640655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7328136.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 36640655 is about 6053.1524844497. The cubic root of 36640655 is about 332.1399196124.

The spelling of 36640655 in words is "thirty-six million, six hundred forty thousand, six hundred fifty-five".