28519116251 has 4 divisors (see below), whose sum is σ = 28538772504. Its totient is φ = 28499460000.

The previous prime is 28519116211. The next prime is 28519116253. The reversal of 28519116251 is 15261191582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28519116251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28519116199 and 28519116208.

It is not an unprimeable number, because it can be changed into a prime (28519116253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9825950 + ... + 9828851.

It is an arithmetic number, because the mean of its divisors is an integer number (7134693126).

Almost surely, 2^28519116251 is an apocalyptic number.

28519116251 is a deficient number, since it is larger than the sum of its proper divisors (19656253).

28519116251 is a wasteful number, since it uses less digits than its factorization.

28519116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19656252.

The product of its digits is 43200, while the sum is 41.

The spelling of 28519116251 in words is "twenty-eight billion, five hundred nineteen million, one hundred sixteen thousand, two hundred fifty-one".