28127550551 has 4 divisors (see below), whose sum is σ = 28135287912. Its totient is φ = 28119813192.

The previous prime is 28127550547. The next prime is 28127550559. The reversal of 28127550551 is 15505572182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15505572182 = 2 ⋅7752786091.

It is a cyclic number.

It is not a de Polignac number, because 28127550551 - 2² = 28127550547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28127550499 and 28127550508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127550559) 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, 3863225 + ... + 3870498.

It is an arithmetic number, because the mean of its divisors is an integer number (7033821978).

Almost surely, 2^28127550551 is an apocalyptic number.

28127550551 is a deficient number, since it is larger than the sum of its proper divisors (7737361).

28127550551 is an equidigital number, since it uses as much as digits as its factorization.

28127550551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737360.

The product of its (nonzero) digits is 140000, while the sum is 41.

The spelling of 28127550551 in words is "twenty-eight billion, one hundred twenty-seven million, five hundred fifty thousand, five hundred fifty-one".