28075549653991 has 8 divisors (see below), whose sum is σ = 33973774371360. Its totient is φ = 22649182914048.

The previous prime is 28075549653971. The next prime is 28075549654067. The reversal of 28075549653991 is 19935694557082.

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 28075549653991 - 2¹³ = 28075549645799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075549653901) 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, 117964494226 + ... + 117964494463.

It is an arithmetic number, because the mean of its divisors is an integer number (4246721796420).

It is a 1-persistent number, because it is pandigital, but 2⋅28075549653991 = 56151099307982 is not.

Almost surely, 2^{28075549653991} is an apocalyptic number.

28075549653991 is a deficient number, since it is larger than the sum of its proper divisors (5898224717369).

28075549653991 is a wasteful number, since it uses less digits than its factorization.

28075549653991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235928988713.

The product of its (nonzero) digits is 734832000, while the sum is 73.

The spelling of 28075549653991 in words is "twenty-eight trillion, seventy-five billion, five hundred forty-nine million, six hundred fifty-three thousand, nine hundred ninety-one".