428605631999 has 8 divisors (see below), whose sum is σ = 442459973760. Its totient is φ = 414753062400.

The previous prime is 428605631981. The next prime is 428605632041. The reversal of 428605631999 is 999136506824.

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

It is a cyclic number.

It is not a de Polignac number, because 428605631999 - 2¹⁶ = 428605566463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428605631939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57479 + ... + 927639.

It is an arithmetic number, because the mean of its divisors is an integer number (55307496720).

Almost surely, 2^428605631999 is an apocalyptic number.

428605631999 is a deficient number, since it is larger than the sum of its proper divisors (13854341761).

428605631999 is a wasteful number, since it uses less digits than its factorization.

428605631999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886081.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 428605631999 in words is "four hundred twenty-eight billion, six hundred five million, six hundred thirty-one thousand, nine hundred ninety-nine".