215644161114 has 40 divisors (see below), whose sum is σ = 484851919860. Its totient is φ = 71636042304.

The previous prime is 215644161107. The next prime is 215644161119. The reversal of 215644161114 is 411161446512.

215644161114 is a `hidden beast` number, since 2 + 1 + 5 + 644 + 1 + 6 + 1 + 1 + 1 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 215291360025 + 352801089 = 463995^2 + 18783^2 .

It is not an unprimeable number, because it can be changed into a prime (215644161119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2224099 + ... + 2319030.

Almost surely, 2^215644161114 is an apocalyptic number.

215644161114 is an abundant number, since it is smaller than the sum of its proper divisors (269207758746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215644161114 is a wasteful number, since it uses less digits than its factorization.

215644161114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543436 (or 4543427 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 215644161114 in words is "two hundred fifteen billion, six hundred forty-four million, one hundred sixty-one thousand, one hundred fourteen".