28555415319 has 4 divisors (see below), whose sum is σ = 38073887096. Its totient is φ = 19036943544.

The previous prime is 28555415309. The next prime is 28555415323. The reversal of 28555415319 is 91351455582.

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

It is not a de Polignac number, because 28555415319 - 2⁴ = 28555415303 is a prime.

It is a super-2 number, since 2×28555415319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555415309) 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, 4759235884 + ... + 4759235889.

It is an arithmetic number, because the mean of its divisors is an integer number (9518471774).

Almost surely, 2^28555415319 is an apocalyptic number.

28555415319 is a deficient number, since it is larger than the sum of its proper divisors (9518471777).

28555415319 is an equidigital number, since it uses as much as digits as its factorization.

28555415319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518471776.

The product of its digits is 1080000, while the sum is 48.

The spelling of 28555415319 in words is "twenty-eight billion, five hundred fifty-five million, four hundred fifteen thousand, three hundred nineteen".