40220435641 has 4 divisors (see below), whose sum is σ = 40902138000. Its totient is φ = 39538733284.

The previous prime is 40220435611. The next prime is 40220435659. The reversal of 40220435641 is 14653402204.

40220435641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40220435641 - 2¹⁷ = 40220304569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40220435611) 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, 340851091 + ... + 340851208.

It is an arithmetic number, because the mean of its divisors is an integer number (10225534500).

Almost surely, 2^40220435641 is an apocalyptic number.

It is an amenable number.

40220435641 is a deficient number, since it is larger than the sum of its proper divisors (681702359).

40220435641 is an equidigital number, since it uses as much as digits as its factorization.

40220435641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681702358.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 40220435641 its reverse (14653402204), we get a palindrome (54873837845).

The spelling of 40220435641 in words is "forty billion, two hundred twenty million, four hundred thirty-five thousand, six hundred forty-one".