2188623508065 has 12 divisors (see below), whose sum is σ = 3793614080724. Its totient is φ = 1167265870944.

The previous prime is 2188623508051. The next prime is 2188623508121. The reversal of 2188623508065 is 5608053268812.

2188623508065 is a `hidden beast` number, since 2 + 1 + 8 + 8 + 623 + 5 + 0 + 8 + 0 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 809222586624 + 1379400921441 = 899568^2 + 1174479^2 .

It is not a de Polignac number, because 2188623508065 - 2¹⁶ = 2188623442529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24318038934 + ... + 24318039023.

It is an arithmetic number, because the mean of its divisors is an integer number (316134506727).

Almost surely, 2^{2188623508065} is an apocalyptic number.

It is an amenable number.

2188623508065 is a deficient number, since it is larger than the sum of its proper divisors (1604990572659).

2188623508065 is a wasteful number, since it uses less digits than its factorization.

2188623508065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48636077968 (or 48636077965 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 2188623508065 in words is "two trillion, one hundred eighty-eight billion, six hundred twenty-three million, five hundred eight thousand, sixty-five".