28819123761 has 4 divisors (see below), whose sum is σ = 38425498352. Its totient is φ = 19212749172.

The previous prime is 28819123747. The next prime is 28819123771. The reversal of 28819123761 is 16732191882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28819123761 - 2⁷ = 28819123633 is a prime.

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 28819123761.

It is not an unprimeable number, because it can be changed into a prime (28819123771) 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, 4803187291 + ... + 4803187296.

It is an arithmetic number, because the mean of its divisors is an integer number (9606374588).

Almost surely, 2^28819123761 is an apocalyptic number.

It is an amenable number.

28819123761 is a deficient number, since it is larger than the sum of its proper divisors (9606374591).

28819123761 is an equidigital number, since it uses as much as digits as its factorization.

28819123761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9606374590.

The product of its digits is 290304, while the sum is 48.

The spelling of 28819123761 in words is "twenty-eight billion, eight hundred nineteen million, one hundred twenty-three thousand, seven hundred sixty-one".