3636561012 has 96 divisors (see below), whose sum is σ = 10224614400. Its totient is φ = 982720512.

The previous prime is 3636560971. The next prime is 3636561023. The reversal of 3636561012 is 2101656363.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1225843 + ... + 1228805.

It is an arithmetic number, because the mean of its divisors is an integer number (106506400).

Almost surely, 2^3636561012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3636561012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5112307200).

3636561012 is an abundant number, since it is smaller than the sum of its proper divisors (6588053388).

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

3636561012 is a wasteful number, since it uses less digits than its factorization.

3636561012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765 (or 3763 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 3636561012 is about 60303.9054456674. The cubic root of 3636561012 is about 1537.7897415215.

The spelling of 3636561012 in words is "three billion, six hundred thirty-six million, five hundred sixty-one thousand, twelve".