40153661 has 8 divisors (see below), whose sum is σ = 41952600. Its totient is φ = 38382400.

The previous prime is 40153627. The next prime is 40153667. The reversal of 40153661 is 16635104.

40153661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24700900 + 15452761 = 4970^2 + 3931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40153661 - 2¹⁸ = 39891517 is a prime.

It is a super-2 number, since 2×40153661² = 3224632983405842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40153661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40153667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3926 + ... + 9783.

It is an arithmetic number, because the mean of its divisors is an integer number (5244075).

Almost surely, 2^40153661 is an apocalyptic number.

It is an amenable number.

40153661 is a deficient number, since it is larger than the sum of its proper divisors (1798939).

40153661 is a wasteful number, since it uses less digits than its factorization.

40153661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13839.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40153661 is about 6336.6916446991. The cubic root of 40153661 is about 342.4325574489.

Adding to 40153661 its reverse (16635104), we get a palindrome (56788765).

The spelling of 40153661 in words is "forty million, one hundred fifty-three thousand, six hundred sixty-one".