28561508514 has 192 divisors, whose sum is σ = 81420318720. Its totient is φ = 7015599360.

The previous prime is 28561508501. The next prime is 28561508527. The reversal of 28561508514 is 41580516582.

28561508514 is a `hidden beast` number, since 2 + 8 + 561 + 5 + 0 + 85 + 1 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (28561508501) and next prime (28561508527).

It is a self number, because there is not a number n which added to its sum of digits gives 28561508514.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2832109 + ... + 2842175.

It is an arithmetic number, because the mean of its divisors is an integer number (424064160).

Almost surely, 2^28561508514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28561508514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40710159360).

28561508514 is an abundant number, since it is smaller than the sum of its proper divisors (52858810206).

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

28561508514 is a wasteful number, since it uses less digits than its factorization.

28561508514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10205 (or 10202 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 28561508514 in words is "twenty-eight billion, five hundred sixty-one million, five hundred eight thousand, five hundred fourteen".