1428777908605 has 128 divisors (see below), whose sum is σ = 2024762572800. Its totient is φ = 961196544000.

The previous prime is 1428777908561. The next prime is 1428777908611. The reversal of 1428777908605 is 5068097778241.

It is not a de Polignac number, because 1428777908605 - 2⁹ = 1428777908093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 296609157 + ... + 296613973.

It is an arithmetic number, because the mean of its divisors is an integer number (15818457600).

Almost surely, 2^{1428777908605} is an apocalyptic number.

It is an amenable number.

1428777908605 is a deficient number, since it is larger than the sum of its proper divisors (595984664195).

1428777908605 is a wasteful number, since it uses less digits than its factorization.

1428777908605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5075.

The product of its (nonzero) digits is 47416320, while the sum is 64.

The spelling of 1428777908605 in words is "one trillion, four hundred twenty-eight billion, seven hundred seventy-seven million, nine hundred eight thousand, six hundred five".