40144043655445 has 4 divisors (see below), whose sum is σ = 48172852386540. Its totient is φ = 32115234924352.

The previous prime is 40144043655439. The next prime is 40144043655539. The reversal of 40144043655445 is 54455634044104.

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 12955838734084 + 27188204921361 = 3599422^2 + 5214231^2 .

It is a cyclic number.

It is not a de Polignac number, because 40144043655445 - 2¹⁵ = 40144043622677 is a prime.

It is a super-2 number, since 2×40144043655445² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4014404365540 + ... + 4014404365549.

It is an arithmetic number, because the mean of its divisors is an integer number (12043213096635).

Almost surely, 2^{40144043655445} is an apocalyptic number.

It is an amenable number.

40144043655445 is a deficient number, since it is larger than the sum of its proper divisors (8028808731095).

40144043655445 is an equidigital number, since it uses as much as digits as its factorization.

40144043655445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8028808731094.

The product of its (nonzero) digits is 9216000, while the sum is 49.

Adding to 40144043655445 its reverse (54455634044104), we get a palindrome (94599677699549).

The spelling of 40144043655445 in words is "forty trillion, one hundred forty-four billion, forty-three million, six hundred fifty-five thousand, four hundred forty-five".