40441023421 has 8 divisors (see below), whose sum is σ = 42966232920. Its totient is φ = 37991193408.

The previous prime is 40441023391. The next prime is 40441023443. The reversal of 40441023421 is 12432014404.

It can be written as a sum of positive squares in 4 ways, for example, as 17811838521 + 22629184900 = 133461^2 + 150430^2 .

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

It is not a de Polignac number, because 40441023421 - 2¹¹ = 40441021373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40441093421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18843766 + ... + 18845911.

It is an arithmetic number, because the mean of its divisors is an integer number (5370779115).

Almost surely, 2^40441023421 is an apocalyptic number.

It is an amenable number.

40441023421 is a deficient number, since it is larger than the sum of its proper divisors (2525209499).

40441023421 is a wasteful number, since it uses less digits than its factorization.

40441023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37689743.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 40441023421 its reverse (12432014404), we get a palindrome (52873037825).

The spelling of 40441023421 in words is "forty billion, four hundred forty-one million, twenty-three thousand, four hundred twenty-one".