3636868720 has 20 divisors (see below), whose sum is σ = 8455719960. Its totient is φ = 1454747456.

The previous prime is 3636868693. The next prime is 3636868747. The reversal of 3636868720 is 278686363.

It is an interprime number because it is at equal distance from previous prime (3636868693) and next prime (3636868747).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22730350 + ... + 22730509.

It is an arithmetic number, because the mean of its divisors is an integer number (422785998).

Almost surely, 2^3636868720 is an apocalyptic number.

It is an amenable number.

3636868720 is an abundant number, since it is smaller than the sum of its proper divisors (4818851240).

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

3636868720 is a wasteful number, since it uses less digits than its factorization.

3636868720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45460872 (or 45460866 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 3636868720 is about 60306.4567024129. The cubic root of 3636868720 is about 1537.8331137128.

It can be divided in two parts, 3636 and 868720, that added together give a square (872356 = 934²).

The spelling of 3636868720 in words is "three billion, six hundred thirty-six million, eight hundred sixty-eight thousand, seven hundred twenty".