428781694517 has 12 divisors (see below), whose sum is σ = 484447775136. Its totient is φ = 376360099920.

The previous prime is 428781694507. The next prime is 428781694529. The reversal of 428781694517 is 715496187824.

It is not a de Polignac number, because 428781694517 - 2²² = 428777500213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428781694517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428781694507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23165633 + ... + 23184134.

It is an arithmetic number, because the mean of its divisors is an integer number (40370647928).

Almost surely, 2^428781694517 is an apocalyptic number.

It is an amenable number.

428781694517 is a deficient number, since it is larger than the sum of its proper divisors (55666080619).

428781694517 is a wasteful number, since it uses less digits than its factorization.

428781694517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46349836 (or 46349807 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 62.

The spelling of 428781694517 in words is "four hundred twenty-eight billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred seventeen".