28555370503 has 8 divisors (see below), whose sum is σ = 32790856320. Its totient is φ = 24593141880.

The previous prime is 28555370497. The next prime is 28555370513. The reversal of 28555370503 is 30507355582.

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 28555370503 - 2⁵ = 28555370471 is a prime.

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 28555370503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555370513) 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, 68314075 + ... + 68314492.

It is an arithmetic number, because the mean of its divisors is an integer number (4098857040).

Almost surely, 2^28555370503 is an apocalyptic number.

28555370503 is a deficient number, since it is larger than the sum of its proper divisors (4235485817).

28555370503 is a wasteful number, since it uses less digits than its factorization.

28555370503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136628597.

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 28555370503 in words is "twenty-eight billion, five hundred fifty-five million, three hundred seventy thousand, five hundred three".