428905808655 has 8 divisors (see below), whose sum is σ = 686249293872. Its totient is φ = 228749764608.

The previous prime is 428905808623. The next prime is 428905808699. The reversal of 428905808655 is 556808509824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428905808655 - 2⁵ = 428905808623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14296860274 + ... + 14296860303.

It is an arithmetic number, because the mean of its divisors is an integer number (85781161734).

Almost surely, 2^428905808655 is an apocalyptic number.

428905808655 is a deficient number, since it is larger than the sum of its proper divisors (257343485217).

428905808655 is a wasteful number, since it uses less digits than its factorization.

428905808655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28593720585.

The product of its (nonzero) digits is 27648000, while the sum is 60.

The spelling of 428905808655 in words is "four hundred twenty-eight billion, nine hundred five million, eight hundred eight thousand, six hundred fifty-five".