636145535250 has 256 divisors, whose sum is σ = 1779458803200. Its totient is φ = 168182784000.

The previous prime is 636145535203. The next prime is 636145535261. The reversal of 636145535250 is 52535541636.

636145535250 is a `hidden beast` number, since 6 + 3 + 61 + 4 + 5 + 535 + 2 + 50 = 666.

It is a super-2 number, since 2×636145535250² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 636145535196 and 636145535205.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 451486546 + ... + 451487954.

It is an arithmetic number, because the mean of its divisors is an integer number (6951010950).

Almost surely, 2^636145535250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636145535250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889729401600).

636145535250 is an abundant number, since it is smaller than the sum of its proper divisors (1143313267950).

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

636145535250 is a wasteful number, since it uses less digits than its factorization.

636145535250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

The spelling of 636145535250 in words is "six hundred thirty-six billion, one hundred forty-five million, five hundred thirty-five thousand, two hundred fifty".