36561599 has 2 divisors, whose sum is σ = 36561600. Its totient is φ = 36561598.

The previous prime is 36561541. The next prime is 36561677. The reversal of 36561599 is 99516563.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36561599 - 2¹² = 36557503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36561799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18280799 + 18280800.

It is an arithmetic number, because the mean of its divisors is an integer number (18280800).

Almost surely, 2^36561599 is an apocalyptic number.

36561599 is a deficient number, since it is larger than the sum of its proper divisors (1).

36561599 is an equidigital number, since it uses as much as digits as its factorization.

36561599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 44.

The square root of 36561599 is about 6046.6188072343. The cubic root of 36561599 is about 331.9008722056.

The spelling of 36561599 in words is "thirty-six million, five hundred sixty-one thousand, five hundred ninety-nine".