3636535680 has 192 divisors, whose sum is σ = 12609464400. Its totient is φ = 965726208.

The previous prime is 3636535667. The next prime is 3636535697. The reversal of 3636535680 is 865356363.

3636535680 is a `hidden beast` number, since 3 + 6 + 36 + 53 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1548267 + ... + 1550613.

Almost surely, 2^3636535680 is an apocalyptic number.

3636535680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3636535680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6304732200).

3636535680 is an abundant number, since it is smaller than the sum of its proper divisors (8972928720).

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

3636535680 is a wasteful number, since it uses less digits than its factorization.

3636535680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2626 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The square root of 3636535680 is about 60303.6954091538. The cubic root of 3636535680 is about 1537.7861708055.

The spelling of 3636535680 in words is "three billion, six hundred thirty-six million, five hundred thirty-five thousand, six hundred eighty".