28561455717696 has 1400 divisors, whose sum is σ = 98202260288000. Its totient is φ = 8197085952000.

The previous prime is 28561455717659. The next prime is 28561455717719. The reversal of 28561455717696 is 69671755416582.

28561455717696 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 1 + 4 + 557 + 1 + 7 + 69 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 143524903005 + ... + 143524903203.

Almost surely, 2^{28561455717696} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28561455717696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49101130144000).

28561455717696 is an abundant number, since it is smaller than the sum of its proper divisors (69640804570304).

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

28561455717696 is an equidigital number, since it uses as much as digits as its factorization.

28561455717696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 307 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 72.

The spelling of 28561455717696 in words is "twenty-eight trillion, five hundred sixty-one billion, four hundred fifty-five million, seven hundred seventeen thousand, six hundred ninety-six".