40221113761 has 4 divisors (see below), whose sum is σ = 40370634900. Its totient is φ = 40071592624.

The previous prime is 40221113759. The next prime is 40221113833. The reversal of 40221113761 is 16731112204.

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 10376478225 + 29844635536 = 101865^2 + 172756^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221113761 - 2¹ = 40221113759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221113861) 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, 74760166 + ... + 74760703.

It is an arithmetic number, because the mean of its divisors is an integer number (10092658725).

Almost surely, 2^40221113761 is an apocalyptic number.

It is an amenable number.

40221113761 is a deficient number, since it is larger than the sum of its proper divisors (149521139).

40221113761 is a wasteful number, since it uses less digits than its factorization.

40221113761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149521138.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 40221113761 its reverse (16731112204), we get a palindrome (56952225965).

The spelling of 40221113761 in words is "forty billion, two hundred twenty-one million, one hundred thirteen thousand, seven hundred sixty-one".