18628777180001 has 6 divisors (see below), whose sum is σ = 19789047039270. Its totient is φ = 17532966757376.

The previous prime is 18628777179919. The next prime is 18628777180021. The reversal of 18628777180001 is 10008177782681.

It can be written as a sum of positive squares in 3 ways, for example, as 2551443960976 + 16077333219025 = 1597324^2 + 4009655^2 .

It is not a de Polignac number, because 18628777180001 - 2³⁸ = 18353899273057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18628777180021) 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 5 ways as a sum of consecutive naturals, for example, 32229718016 + ... + 32229718593.

It is an arithmetic number, because the mean of its divisors is an integer number (3298174506545).

Almost surely, 2^{18628777180001} is an apocalyptic number.

It is an amenable number.

18628777180001 is a deficient number, since it is larger than the sum of its proper divisors (1160269859269).

18628777180001 is an equidigital number, since it uses as much as digits as its factorization.

18628777180001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64459436643 (or 64459436626 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 56.

The spelling of 18628777180001 in words is "eighteen trillion, six hundred twenty-eight billion, seven hundred seventy-seven million, one hundred eighty thousand, one".