428749502565 has 16 divisors (see below), whose sum is σ = 708128211456. Its totient is φ = 221290065600.

The previous prime is 428749502563. The next prime is 428749502593. The reversal of 428749502565 is 565205947824.

It is not a de Polignac number, because 428749502565 - 2¹ = 428749502563 is a prime.

It is a super-2 number, since 2×428749502565² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428749502563) 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, 461020506 + ... + 461021435.

It is an arithmetic number, because the mean of its divisors is an integer number (44258013216).

Almost surely, 2^428749502565 is an apocalyptic number.

It is an amenable number.

428749502565 is a deficient number, since it is larger than the sum of its proper divisors (279378708891).

428749502565 is a wasteful number, since it uses less digits than its factorization.

428749502565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922041980.

The product of its (nonzero) digits is 24192000, while the sum is 57.

The spelling of 428749502565 in words is "four hundred twenty-eight billion, seven hundred forty-nine million, five hundred two thousand, five hundred sixty-five".