28161493481472 has 384 divisors, whose sum is σ = 84413022220800. Its totient is φ = 8284076900352.

The previous prime is 28161493481467. The next prime is 28161493481503. The reversal of 28161493481472 is 27418439416182.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6490316679 + ... + 6490321017.

It is an arithmetic number, because the mean of its divisors is an integer number (219825578700).

Almost surely, 2^{28161493481472} 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 28161493481472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42206511110400).

28161493481472 is an abundant number, since it is smaller than the sum of its proper divisors (56251528739328).

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

28161493481472 is a wasteful number, since it uses less digits than its factorization.

28161493481472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933 (or 7913 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 28161493481472 in words is "twenty-eight trillion, one hundred sixty-one billion, four hundred ninety-three million, four hundred eighty-one thousand, four hundred seventy-two".