28552775749 has 8 divisors (see below), whose sum is σ = 30695034240. Its totient is φ = 26474465376.

The previous prime is 28552775707. The next prime is 28552775789. The reversal of 28552775749 is 94757725582.

It is a happy number.

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 28552775749 - 2²⁵ = 28519221317 is a prime.

It is a super-2 number, since 2×28552775749² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552775789) 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, 15986104 + ... + 15987889.

It is an arithmetic number, because the mean of its divisors is an integer number (3836879280).

Almost surely, 2^28552775749 is an apocalyptic number.

It is an amenable number.

28552775749 is a deficient number, since it is larger than the sum of its proper divisors (2142258491).

28552775749 is a wasteful number, since it uses less digits than its factorization.

28552775749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31974059.

The product of its digits is 49392000, while the sum is 61.

The spelling of 28552775749 in words is "twenty-eight billion, five hundred fifty-two million, seven hundred seventy-five thousand, seven hundred forty-nine".