28533617481 has 8 divisors (see below), whose sum is σ = 38668509184. Its totient is φ = 18710568720.

The previous prime is 28533617477. The next prime is 28533617507. The reversal of 28533617481 is 18471633582.

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

It is not a de Polignac number, because 28533617481 - 2² = 28533617477 is a prime.

It is a super-2 number, since 2×28533617481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28533617481.

It is not an unprimeable number, because it can be changed into a prime (28533617381) 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, 77960521 + ... + 77960886.

It is an arithmetic number, because the mean of its divisors is an integer number (4833563648).

Almost surely, 2^28533617481 is an apocalyptic number.

It is an amenable number.

28533617481 is a deficient number, since it is larger than the sum of its proper divisors (10134891703).

28533617481 is a wasteful number, since it uses less digits than its factorization.

28533617481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155921471.

The product of its digits is 967680, while the sum is 48.

The spelling of 28533617481 in words is "twenty-eight billion, five hundred thirty-three million, six hundred seventeen thousand, four hundred eighty-one".