28553535504 has 400 divisors, whose sum is σ = 92014610688. Its totient is φ = 8493133824.

The previous prime is 28553535499. The next prime is 28553535553. The reversal of 28553535504 is 40553535582.

28553535504 is a `hidden beast` number, since 2 + 85 + 5 + 35 + 35 + 504 = 666.

It is a super-4 number, since 4×28553535504⁴ (a number of 43 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28553535504.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 84728424 + ... + 84728760.

Almost surely, 2^28553535504 is an apocalyptic number.

28553535504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28553535504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46007305344).

28553535504 is an abundant number, since it is smaller than the sum of its proper divisors (63461075184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28553535504 is a wasteful number, since it uses less digits than its factorization.

28553535504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 28553535504 in words is "twenty-eight billion, five hundred fifty-three million, five hundred thirty-five thousand, five hundred four".