440413403421401 has 2 divisors, whose sum is σ = 440413403421402. Its totient is φ = 440413403421400.

The previous prime is 440413403421379. The next prime is 440413403421491. The reversal of 440413403421401 is 104124304314044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423527180210176 + 16886223211225 = 20579776^2 + 4109285^2 .

It is a cyclic number.

It is not a de Polignac number, because 440413403421401 - 2²² = 440413399227097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (440413403421491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220206701710700 + 220206701710701.

It is an arithmetic number, because the mean of its divisors is an integer number (220206701710701).

Almost surely, 2^{440413403421401} is an apocalyptic number.

It is an amenable number.

440413403421401 is a deficient number, since it is larger than the sum of its proper divisors (1).

440413403421401 is an equidigital number, since it uses as much as digits as its factorization.

440413403421401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 440413403421401 its reverse (104124304314044), we get a palindrome (544537707735445).

The spelling of 440413403421401 in words is "four hundred forty trillion, four hundred thirteen billion, four hundred three million, four hundred twenty-one thousand, four hundred one".