28545633557 has 8 divisors (see below), whose sum is σ = 32640473856. Its totient is φ = 24455016432.

The previous prime is 28545633551. The next prime is 28545633577. The reversal of 28545633557 is 75533654582.

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

It is not a de Polignac number, because 28545633557 - 2²² = 28541439253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28545633499 and 28545633508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545633551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041293 + ... + 1068354.

It is an arithmetic number, because the mean of its divisors is an integer number (4080059232).

Almost surely, 2^28545633557 is an apocalyptic number.

It is an amenable number.

28545633557 is a deficient number, since it is larger than the sum of its proper divisors (4094840299).

28545633557 is a wasteful number, since it uses less digits than its factorization.

28545633557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111587.

The product of its digits is 15120000, while the sum is 53.

The spelling of 28545633557 in words is "twenty-eight billion, five hundred forty-five million, six hundred thirty-three thousand, five hundred fifty-seven".