428521471722811 has 16 divisors (see below), whose sum is σ = 449751529265920. Its totient is φ = 407808799856640.

The previous prime is 428521471722793. The next prime is 428521471722833. The reversal of 428521471722811 is 118227174125824.

It is a cyclic number.

It is not a de Polignac number, because 428521471722811 - 2³¹ = 428519324239163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428521471722011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453374946 + ... + 454319143.

It is an arithmetic number, because the mean of its divisors is an integer number (28109470579120).

Almost surely, 2^{428521471722811} is an apocalyptic number.

428521471722811 is a deficient number, since it is larger than the sum of its proper divisors (21230057543109).

428521471722811 is a wasteful number, since it uses less digits than its factorization.

428521471722811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907694374.

The product of its digits is 4014080, while the sum is 55.

The spelling of 428521471722811 in words is "four hundred twenty-eight trillion, five hundred twenty-one billion, four hundred seventy-one million, seven hundred twenty-two thousand, eight hundred eleven".