28191441520019 has 8 divisors (see below), whose sum is σ = 29937814005840. Its totient is φ = 26471330274816.

The previous prime is 28191441519961. The next prime is 28191441520079. The reversal of 28191441520019 is 91002514419182.

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 28191441520019 - 2³² = 28187146552723 is a prime.

It is a super-2 number, since 2×28191441520019² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28191441520079) 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, 6565307942 + ... + 6565312235.

It is an arithmetic number, because the mean of its divisors is an integer number (3742226750730).

Almost surely, 2^{28191441520019} is an apocalyptic number.

28191441520019 is a deficient number, since it is larger than the sum of its proper divisors (1746372485821).

28191441520019 is a wasteful number, since it uses less digits than its factorization.

28191441520019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130620309.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 28191441520019 in words is "twenty-eight trillion, one hundred ninety-one billion, four hundred forty-one million, five hundred twenty thousand, nineteen".