36636521616 has 100 divisors (see below), whose sum is σ = 106182227712. Its totient is φ = 12195417024.

The previous prime is 36636521611. The next prime is 36636521651. The reversal of 36636521616 is 61612563663.

36636521616 is a `hidden beast` number, since 3 + 6 + 6 + 3 + 6 + 5 + 21 + 616 = 666.

It is a super-2 number, since 2×36636521616² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36636521611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 943905 + ... + 981951.

Almost surely, 2^36636521616 is an apocalyptic number.

36636521616 is a gapful number since it is divisible by the number (36) 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 36636521616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53091113856).

36636521616 is an abundant number, since it is smaller than the sum of its proper divisors (69545706096).

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

36636521616 is a wasteful number, since it uses less digits than its factorization.

36636521616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38810 (or 38795 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 36636521616 in words is "thirty-six billion, six hundred thirty-six million, five hundred twenty-one thousand, six hundred sixteen".