28155118773 has 8 divisors (see below), whose sum is σ = 37540993600. Its totient is φ = 18769661568.

The previous prime is 28155118637. The next prime is 28155118781. The reversal of 28155118773 is 37781155182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28155118773 - 2⁹ = 28155118261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28155118073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124773 + ... + 268101.

It is an arithmetic number, because the mean of its divisors is an integer number (4692624200).

Almost surely, 2^28155118773 is an apocalyptic number.

It is an amenable number.

28155118773 is a deficient number, since it is larger than the sum of its proper divisors (9385874827).

28155118773 is a wasteful number, since it uses less digits than its factorization.

28155118773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208811.

The product of its digits is 470400, while the sum is 48.

The spelling of 28155118773 in words is "twenty-eight billion, one hundred fifty-five million, one hundred eighteen thousand, seven hundred seventy-three".