28315749549 has 8 divisors (see below), whose sum is σ = 37774518912. Its totient is φ = 18867073280.

The previous prime is 28315749523. The next prime is 28315749557. The reversal of 28315749549 is 94594751382.

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 28315749549 - 2¹² = 28315745453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315749589) 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, 2516724 + ... + 2527949.

It is an arithmetic number, because the mean of its divisors is an integer number (4721814864).

Almost surely, 2^28315749549 is an apocalyptic number.

It is an amenable number.

28315749549 is a deficient number, since it is larger than the sum of its proper divisors (9458769363).

28315749549 is a wasteful number, since it uses less digits than its factorization.

28315749549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046547.

The product of its digits is 10886400, while the sum is 57.

The spelling of 28315749549 in words is "twenty-eight billion, three hundred fifteen million, seven hundred forty-nine thousand, five hundred forty-nine".