636546480 has 80 divisors (see below), whose sum is σ = 1980777984. Its totient is φ = 169102080.

The previous prime is 636546451. The next prime is 636546481. The reversal of 636546480 is 84645636.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (636546481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60147 + ... + 69933.

Almost surely, 2^636546480 is an apocalyptic number.

636546480 is a gapful number since it is divisible by the number (60) 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 636546480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990388992).

636546480 is an abundant number, since it is smaller than the sum of its proper divisors (1344231504).

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

636546480 is a wasteful number, since it uses less digits than its factorization.

636546480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10074 (or 10068 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 636546480 is about 25229.8727701905. The cubic root of 636546480 is about 860.2209996304.

The spelling of 636546480 in words is "six hundred thirty-six million, five hundred forty-six thousand, four hundred eighty".