440121002165513 has 2 divisors, whose sum is σ = 440121002165514. Its totient is φ = 440121002165512.

The previous prime is 440121002165503. The next prime is 440121002165531. The reversal of 440121002165513 is 315561200121044.

It is a happy number.

Together with next prime (440121002165531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331187695264969 + 108933306900544 = 18198563^2 + 10437112^2 .

It is a cyclic number.

It is not a de Polignac number, because 440121002165513 - 2²² = 440120997971209 is a prime.

It is not a weakly prime, because it can be changed into another prime (440121002165503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220060501082756 + 220060501082757.

It is an arithmetic number, because the mean of its divisors is an integer number (220060501082757).

Almost surely, 2^{440121002165513} is an apocalyptic number.

It is an amenable number.

440121002165513 is a deficient number, since it is larger than the sum of its proper divisors (1).

440121002165513 is an equidigital number, since it uses as much as digits as its factorization.

440121002165513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 440121002165513 its reverse (315561200121044), we get a palindrome (755682202286557).

The spelling of 440121002165513 in words is "four hundred forty trillion, one hundred twenty-one billion, two million, one hundred sixty-five thousand, five hundred thirteen".