40444211261 has 4 divisors (see below), whose sum is σ = 40667660124. Its totient is φ = 40220762400.

The previous prime is 40444211221. The next prime is 40444211293. The reversal of 40444211261 is 16211244404.

40444211261 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.

It can be written as a sum of positive squares in 2 ways, for example, as 3774259225 + 36669952036 = 61435^2 + 191494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40444211261 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 (40444211221) 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, 111724160 + ... + 111724521.

It is an arithmetic number, because the mean of its divisors is an integer number (10166915031).

Almost surely, 2^40444211261 is an apocalyptic number.

It is an amenable number.

40444211261 is a deficient number, since it is larger than the sum of its proper divisors (223448863).

40444211261 is a wasteful number, since it uses less digits than its factorization.

40444211261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223448862.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 40444211261 its reverse (16211244404), we get a palindrome (56655455665).

The spelling of 40444211261 in words is "forty billion, four hundred forty-four million, two hundred eleven thousand, two hundred sixty-one".