28554765079919 has 4 divisors (see below), whose sum is σ = 30751285470696. Its totient is φ = 26358244689144.

The previous prime is 28554765079877. The next prime is 28554765079933. The reversal of 28554765079919 is 91997056745582.

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

It is a cyclic number.

It is not a de Polignac number, because 28554765079919 - 2⁸ = 28554765079663 is a prime.

It is a super-2 number, since 2×28554765079919² (a number of 28 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 28554765079919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28554765079969) 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, 1098260195369 + ... + 1098260195394.

It is an arithmetic number, because the mean of its divisors is an integer number (7687821367674).

Almost surely, 2^{28554765079919} is an apocalyptic number.

28554765079919 is a deficient number, since it is larger than the sum of its proper divisors (2196520390777).

28554765079919 is a wasteful number, since it uses less digits than its factorization.

28554765079919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196520390776.

The product of its (nonzero) digits is 1714608000, while the sum is 77.

The spelling of 28554765079919 in words is "twenty-eight trillion, five hundred fifty-four billion, seven hundred sixty-five million, seventy-nine thousand, nine hundred nineteen".