636036516 has 48 divisors (see below), whose sum is σ = 1659530880. Its totient is φ = 210656160.

The previous prime is 636036493. The next prime is 636036523. The reversal of 636036516 is 615630636.

It is a happy number.

636036516 is a `hidden beast` number, since 636 + 0 + 3 + 6 + 5 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1800 + ... + 35711.

It is an arithmetic number, because the mean of its divisors is an integer number (34573560).

Almost surely, 2^636036516 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 636036516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829765440).

636036516 is an abundant number, since it is smaller than the sum of its proper divisors (1023494364).

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

636036516 is a wasteful number, since it uses less digits than its factorization.

636036516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37681 (or 37673 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 636036516 is about 25219.7643922381. The cubic root of 636036516 is about 859.9912185871.

The spelling of 636036516 in words is "six hundred thirty-six million, thirty-six thousand, five hundred sixteen".