428665774649 has 16 divisors (see below), whose sum is σ = 503171565696. Its totient is φ = 357478012800.

The previous prime is 428665774619. The next prime is 428665774709. The reversal of 428665774649 is 946477566824.

It is a cyclic number.

It is not a de Polignac number, because 428665774649 - 2¹⁶ = 428665709113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428665774619) 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, 6746669 + ... + 6809909.

It is an arithmetic number, because the mean of its divisors is an integer number (31448222856).

Almost surely, 2^428665774649 is an apocalyptic number.

It is an amenable number.

428665774649 is a deficient number, since it is larger than the sum of its proper divisors (74505791047).

428665774649 is a wasteful number, since it uses less digits than its factorization.

428665774649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89456.

The product of its digits is 487710720, while the sum is 68.

The spelling of 428665774649 in words is "four hundred twenty-eight billion, six hundred sixty-five million, seven hundred seventy-four thousand, six hundred forty-nine".