18740728875641 has 8 divisors (see below), whose sum is σ = 18762414759144. Its totient is φ = 18719043932160.

The previous prime is 18740728875601. The next prime is 18740728875647. The reversal of 18740728875641 is 14657882704781.

It can be written as a sum of positive squares in 4 ways, for example, as 909026858041 + 17831702017600 = 953429^2 + 4222760^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18740728875641 - 2⁶ = 18740728875577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18740728875647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44595881 + ... + 45014153.

It is an arithmetic number, because the mean of its divisors is an integer number (2345301844893).

Almost surely, 2^{18740728875641} is an apocalyptic number.

It is an amenable number.

18740728875641 is a deficient number, since it is larger than the sum of its proper divisors (21685883503).

18740728875641 is an equidigital number, since it uses as much as digits as its factorization.

18740728875641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470011.

The product of its (nonzero) digits is 168591360, while the sum is 68.

The spelling of 18740728875641 in words is "eighteen trillion, seven hundred forty billion, seven hundred twenty-eight million, eight hundred seventy-five thousand, six hundred forty-one".