28147693529087 has 4 divisors (see below), whose sum is σ = 30706574759016. Its totient is φ = 25588812299160.

The previous prime is 28147693529069. The next prime is 28147693529141. The reversal of 28147693529087 is 78092539674182.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28147693529087 - 2⁶ = 28147693529023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28147693529087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28147693529987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279440614948 + ... + 1279440614969.

It is an arithmetic number, because the mean of its divisors is an integer number (7676643689754).

It is a 2-persistent number, because it is pandigital, and so is 2⋅28147693529087 = 56295387058174, but 3⋅28147693529087 = 84443080587261 is not.

Almost surely, 2^{28147693529087} is an apocalyptic number.

28147693529087 is a deficient number, since it is larger than the sum of its proper divisors (2558881229929).

28147693529087 is a wasteful number, since it uses less digits than its factorization.

28147693529087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558881229928.

The product of its (nonzero) digits is 365783040, while the sum is 71.

The spelling of 28147693529087 in words is "twenty-eight trillion, one hundred forty-seven billion, six hundred ninety-three million, five hundred twenty-nine thousand, eighty-seven".