36845581 has 2 divisors, whose sum is σ = 36845582. Its totient is φ = 36845580.

The previous prime is 36845569. The next prime is 36845587. The reversal of 36845581 is 18554863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 8649481 = 5310^2 + 2941^2 .

It is a cyclic number.

It is not a de Polignac number, because 36845581 - 2²³ = 28456973 is a prime.

It is a super-2 number, since 2×36845581² = 2715193678455122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36845587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18422790 + 18422791.

It is an arithmetic number, because the mean of its divisors is an integer number (18422791).

Almost surely, 2^36845581 is an apocalyptic number.

It is an amenable number.

36845581 is a deficient number, since it is larger than the sum of its proper divisors (1).

36845581 is an equidigital number, since it uses as much as digits as its factorization.

36845581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 36845581 is about 6070.0560952927. The cubic root of 36845581 is about 332.7579726740.

The spelling of 36845581 in words is "thirty-six million, eight hundred forty-five thousand, five hundred eighty-one".