440121002165491 has 2 divisors, whose sum is σ = 440121002165492. Its totient is φ = 440121002165490.

The previous prime is 440121002165479. The next prime is 440121002165503. The reversal of 440121002165491 is 194561200121044.

It is a balanced prime because it is at equal distance from previous prime (440121002165479) and next prime (440121002165503).

It is a cyclic number.

It is not a de Polignac number, because 440121002165491 - 2⁷ = 440121002165363 is a prime.

It is a super-2 number, since 2×440121002165491² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (440121002165431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220060501082745 + 220060501082746.

It is an arithmetic number, because the mean of its divisors is an integer number (220060501082746).

Almost surely, 2^{440121002165491} is an apocalyptic number.

440121002165491 is a deficient number, since it is larger than the sum of its proper divisors (1).

440121002165491 is an equidigital number, since it uses as much as digits as its factorization.

440121002165491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 440121002165491 in words is "four hundred forty trillion, one hundred twenty-one billion, two million, one hundred sixty-five thousand, four hundred ninety-one".