40361645 has 4 divisors (see below), whose sum is σ = 48433980. Its totient is φ = 32289312.

The previous prime is 40361639. The next prime is 40361669. The reversal of 40361645 is 54616304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26604964 + 13756681 = 5158^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 40361645 - 2¹² = 40357549 is a prime.

It is a super-3 number, since 3×40361645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4036160 + ... + 4036169.

It is an arithmetic number, because the mean of its divisors is an integer number (12108495).

Almost surely, 2^40361645 is an apocalyptic number.

It is an amenable number.

40361645 is a deficient number, since it is larger than the sum of its proper divisors (8072335).

40361645 is an equidigital number, since it uses as much as digits as its factorization.

40361645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8072334.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 40361645 is about 6353.0815357588. The cubic root of 40361645 is about 343.0227724456.

Adding to 40361645 its reverse (54616304), we get a palindrome (94977949).

The spelling of 40361645 in words is "forty million, three hundred sixty-one thousand, six hundred forty-five".