636226255632 has 160 divisors (see below), whose sum is σ = 1838458581120. Its totient is φ = 187916800000.

The previous prime is 636226255627. The next prime is 636226255633. The reversal of 636226255632 is 236552622636.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (636226255633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23994382 + ... + 24020882.

It is an arithmetic number, because the mean of its divisors is an integer number (11490366132).

Almost surely, 2^636226255632 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 636226255632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919229290560).

636226255632 is an abundant number, since it is smaller than the sum of its proper divisors (1202232325488).

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

636226255632 is a wasteful number, since it uses less digits than its factorization.

636226255632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27673 (or 27667 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 48.

The spelling of 636226255632 in words is "six hundred thirty-six billion, two hundred twenty-six million, two hundred fifty-five thousand, six hundred thirty-two".