1420278505565 has 16 divisors (see below), whose sum is σ = 1810391731200. Its totient is φ = 1065947608320.

The previous prime is 1420278505561. The next prime is 1420278505571. The reversal of 1420278505565 is 5655058720241.

It is not a de Polignac number, because 1420278505565 - 2² = 1420278505561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420278505561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26837165 + ... + 26890034.

It is an arithmetic number, because the mean of its divisors is an integer number (113149483200).

Almost surely, 2^{1420278505565} is an apocalyptic number.

It is an amenable number.

1420278505565 is a deficient number, since it is larger than the sum of its proper divisors (390113225635).

1420278505565 is a wasteful number, since it uses less digits than its factorization.

1420278505565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53727532.

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 1420278505565 in words is "one trillion, four hundred twenty billion, two hundred seventy-eight million, five hundred five thousand, five hundred sixty-five".