636040115480 has 768 divisors, whose sum is σ = 2007742464000. Its totient is φ = 180317491200.

The previous prime is 636040115363. The next prime is 636040115489. The reversal of 636040115480 is 84511040636.

It is a super-3 number, since 3×636040115480³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636040115489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 874882877 + ... + 874883603.

It is an arithmetic number, because the mean of its divisors is an integer number (2614248000).

Almost surely, 2^636040115480 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 636040115480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003871232000).

636040115480 is an abundant number, since it is smaller than the sum of its proper divisors (1371702348520).

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

636040115480 is a wasteful number, since it uses less digits than its factorization.

636040115480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 636040115480 in words is "six hundred thirty-six billion, forty million, one hundred fifteen thousand, four hundred eighty".