3640624273764 has 27 divisors (see below), whose sum is σ = 9202718075187. Its totient is φ = 1213537608504.

The previous prime is 3640624273721. The next prime is 3640624273817. The reversal of 3640624273764 is 4673724260463.

It is a happy number.

The square root of 3640624273764 is 1908042.

It is a perfect power (a square), and thus also a powerful number.

3640624273764 is a `hidden beast` number, since 3 + 6 + 4 + 0 + 624 + 2 + 7 + 3 + 7 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3640624273764.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 11289249 + ... + 11607255.

Almost surely, 2^{3640624273764} is an apocalyptic number.

3640624273764 is the 1908042-nd square number.

It is an amenable number.

3640624273764 is an abundant number, since it is smaller than the sum of its proper divisors (5562093801423).

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

3640624273764 is an frugal number, since it uses more digits than its factorization.

3640624273764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636024 (or 318012 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 54.

The spelling of 3640624273764 in words is "three trillion, six hundred forty billion, six hundred twenty-four million, two hundred seventy-three thousand, seven hundred sixty-four".