102728918813 has 4 divisors (see below), whose sum is σ = 107195393568. Its totient is φ = 98262444060.

The previous prime is 102728918807. The next prime is 102728918827. The reversal of 102728918813 is 318819827201.

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 a cyclic number.

It is not a de Polignac number, because 102728918813 - 2¹⁶ = 102728853277 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 (102728918833) 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, 2233237343 + ... + 2233237388.

It is an arithmetic number, because the mean of its divisors is an integer number (26798848392).

Almost surely, 2^102728918813 is an apocalyptic number.

It is an amenable number.

102728918813 is a deficient number, since it is larger than the sum of its proper divisors (4466474755).

102728918813 is an equidigital number, since it uses as much as digits as its factorization.

102728918813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466474754.

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 102728918813 in words is "one hundred two billion, seven hundred twenty-eight million, nine hundred eighteen thousand, eight hundred thirteen".