18872661164857 has 8 divisors (see below), whose sum is σ = 19895955766272. Its totient is φ = 17875272756000.

The previous prime is 18872661164849. The next prime is 18872661164899. The reversal of 18872661164857 is 75846116627881.

It is a happy number.

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 18872661164857 - 2³ = 18872661164849 is a prime.

It is a super-2 number, since 2×18872661164857² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18872661164657) 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, 6476546644 + ... + 6476549557.

It is an arithmetic number, because the mean of its divisors is an integer number (2486994470784).

Almost surely, 2^{18872661164857} is an apocalyptic number.

It is an amenable number.

18872661164857 is a deficient number, since it is larger than the sum of its proper divisors (1023294601415).

18872661164857 is a wasteful number, since it uses less digits than its factorization.

18872661164857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12953096279.

The product of its digits is 216760320, while the sum is 70.

The spelling of 18872661164857 in words is "eighteen trillion, eight hundred seventy-two billion, six hundred sixty-one million, one hundred sixty-four thousand, eight hundred fifty-seven".