18825687128161 has 8 divisors (see below), whose sum is σ = 20321581308480. Its totient is φ = 17386241784912.

The previous prime is 18825687128123. The next prime is 18825687128231. The reversal of 18825687128161 is 16182178652881.

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 18825687128161 - 2¹⁹ = 18825686603873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18825687128093 and 18825687128102.

It is not an unprimeable number, because it can be changed into a prime (18825687138161) 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, 14112208575 + ... + 14112209908.

It is an arithmetic number, because the mean of its divisors is an integer number (2540197663560).

Almost surely, 2^{18825687128161} is an apocalyptic number.

It is an amenable number.

18825687128161 is a deficient number, since it is larger than the sum of its proper divisors (1495894180319).

18825687128161 is a wasteful number, since it uses less digits than its factorization.

18825687128161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28224418535.

The product of its digits is 20643840, while the sum is 64.

The spelling of 18825687128161 in words is "eighteen trillion, eight hundred twenty-five billion, six hundred eighty-seven million, one hundred twenty-eight thousand, one hundred sixty-one".