636389277696 has 480 divisors, whose sum is σ = 1972311264000. Its totient is φ = 202590388224.

The previous prime is 636389277581. The next prime is 636389277773. The reversal of 636389277696 is 696772983636.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 965689015 + ... + 965689673.

It is an arithmetic number, because the mean of its divisors is an integer number (4108981800).

Almost surely, 2^636389277696 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 636389277696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986155632000).

636389277696 is an abundant number, since it is smaller than the sum of its proper divisors (1335921986304).

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

636389277696 is an equidigital number, since it uses as much as digits as its factorization.

636389277696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 760 counting only the distinct ones).

The product of its digits is 740710656, while the sum is 72.

The spelling of 636389277696 in words is "six hundred thirty-six billion, three hundred eighty-nine million, two hundred seventy-seven thousand, six hundred ninety-six".