2636691966636 has 384 divisors, whose sum is σ = 7778130984960. Its totient is φ = 676797907968.

The previous prime is 2636691966583. The next prime is 2636691966637. The reversal of 2636691966636 is 6366691966362.

2636691966636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2636691966637) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1807190475 + ... + 1807191933.

It is an arithmetic number, because the mean of its divisors is an integer number (20255549440).

Almost surely, 2^{2636691966636} is an apocalyptic number.

2636691966636 is a gapful number since it is divisible by the number (26) 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 2636691966636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3889065492480).

2636691966636 is an abundant number, since it is smaller than the sum of its proper divisors (5141439018324).

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

2636691966636 is a wasteful number, since it uses less digits than its factorization.

2636691966636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1851 counting only the distinct ones).

The product of its digits is 408146688, while the sum is 69.

The spelling of 2636691966636 in words is "two trillion, six hundred thirty-six billion, six hundred ninety-one million, nine hundred sixty-six thousand, six hundred thirty-six".