36646642536 has 96 divisors (see below), whose sum is σ = 106841566080. Its totient is φ = 10444224000.

The previous prime is 36646642531. The next prime is 36646642567. The reversal of 36646642536 is 63524664663.

It is a super-2 number, since 2×36646642536² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (36646642531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 432721 + ... + 510431.

It is an arithmetic number, because the mean of its divisors is an integer number (1112932980).

Almost surely, 2^36646642536 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 36646642536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53420783040).

36646642536 is an abundant number, since it is smaller than the sum of its proper divisors (70194923544).

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

36646642536 is a wasteful number, since it uses less digits than its factorization.

36646642536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78135 (or 78124 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 51.

The spelling of 36646642536 in words is "thirty-six billion, six hundred forty-six million, six hundred forty-two thousand, five hundred thirty-six".