2144694636 has 72 divisors (see below), whose sum is σ = 6560255520. Its totient is φ = 576723456.

The previous prime is 2144694631. The next prime is 2144694637. The reversal of 2144694636 is 6364964412.

2144694636 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 6 + 9 + 4 + 636 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2144694591 and 2144694600.

It is not an unprimeable number, because it can be changed into a prime (2144694631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246031 + ... + 254598.

It is an arithmetic number, because the mean of its divisors is an integer number (91114660).

Almost surely, 2^2144694636 is an apocalyptic number.

It is an amenable number.

2144694636 is an abundant number, since it is smaller than the sum of its proper divisors (4415560884).

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

2144694636 is a wasteful number, since it uses less digits than its factorization.

2144694636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500663 (or 500658 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 2144694636 is about 46310.8479300477. The cubic root of 2144694636 is about 1289.6003882109.

The spelling of 2144694636 in words is "two billion, one hundred forty-four million, six hundred ninety-four thousand, six hundred thirty-six".