28645562719 has 4 divisors (see below), whose sum is σ = 28645931344. Its totient is φ = 28645194096.

The previous prime is 28645562713. The next prime is 28645562749. The reversal of 28645562719 is 91726554682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28645562719 - 2¹⁵ = 28645529951 is a prime.

It is a super-2 number, since 2×28645562719² (a number of 22 digits) contains 22 as substring.

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 28645562719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645562713) 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, 17307 + ... + 239980.

It is an arithmetic number, because the mean of its divisors is an integer number (7161482836).

Almost surely, 2^28645562719 is an apocalyptic number.

28645562719 is a deficient number, since it is larger than the sum of its proper divisors (368625).

28645562719 is a wasteful number, since it uses less digits than its factorization.

28645562719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368624.

The product of its digits is 7257600, while the sum is 55.

The spelling of 28645562719 in words is "twenty-eight billion, six hundred forty-five million, five hundred sixty-two thousand, seven hundred nineteen".